Example of a sort of working switch (but the blue dot shifts backup)
2020-02-27 07:51:33 DEBUG (MainThread) [homeassistant.components.mqtt] Transmitting message on zwave2mqtt/nodeID_10/38/1/0/set: 255
2020-02-27 07:51:39 DEBUG (MainThread) [homeassistant.components.mqtt] Transmitting message on zwave2mqtt/nodeID_10/38/1/0/set: 255
2020-02-27 07:51:41 DEBUG (MainThread) [homeassistant.components.mqtt] Transmitting message on zwave2mqtt/nodeID_10/38/1/0/set: 0
And the corosponding OZW_Log
2020-02-27 07:51:15.392 Info, Node010, Value::Set - COMMAND_CLASS_SWITCH_MULTILEVEL - Level - 0 - 1 - 255
2020-02-27 07:51:15.392 Info, Node010, SwitchMultilevel::Set - Setting to level 255
2020-02-27 07:51:15.392 Info, Node010, Duration: Default
2020-02-27 07:51:15.392 Detail, Node010, Queuing (Send) SwitchMultilevelCmd_Set (Node=10): 0x01, 0x0b, 0x00, 0x13, 0x0a, 0x04, 0x26, 0x01, 0xff, 0xff, 0x25, 0x44, 0xaf
2020-02-27 07:51:15.392 Detail, Node010, Queuing (Send) SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x45, 0xa9
2020-02-27 07:51:15.392 Info, Node010, Sending (Send) message (Callback ID=0x44, Expected Reply=0x13) - SwitchMultilevelCmd_Set (Node=10): 0x01, 0x0b, 0x00, 0x13, 0x0a, 0x04, 0x26, 0x01, 0xff, 0xff, 0x25, 0x44, 0xaf
2020-02-27 07:51:15.392 Info, Node010, Encrypted Flag is 0
2020-02-27 07:51:15.401 Detail, Node010, Received: 0x01, 0x04, 0x01, 0x13, 0x01, 0xe8
2020-02-27 07:51:15.401 Detail, Node010, ZW_SEND_DATA delivered to Z-Wave stack
2020-02-27 07:51:15.520 Detail, Node010, Received: 0x01, 0x18, 0x00, 0x13, 0x44, 0x00, 0x00, 0x0c, 0x01, 0xb3, 0x7f, 0x7f, 0x7f, 0x7f, 0x01, 0x01, 0x03, 0x17, 0x00, 0x00, 0x00, 0x02, 0x03, 0x00, 0x00, 0x1b
2020-02-27 07:51:15.520 Detail, Node010, ZW_SEND_DATA Request with callback ID 0x44 received (expected 0x44)
2020-02-27 07:51:15.520 Info, Node010, Request RTT 127 Average Request RTT 90
2020-02-27 07:51:15.521 Detail, Node010, Extended TxStatus: Time: 120, Hops: 1, Rssi: -77 --- --- --- ---, AckChannel: 1, TxChannel: 1, RouteScheme: Last Working Route, Route: 23 0 0 0, RouteSpeed: 40K, RouteTries: 3, FailedLinkFrom: 0, FailedLinkTo: 0
2020-02-27 07:51:15.521 Detail, Node010, Expected callbackId was received
2020-02-27 07:51:15.521 Detail, Node010, Expected reply was received
2020-02-27 07:51:15.521 Detail, Node010, Message transaction complete
2020-02-27 07:51:15.521 Detail, Node010, Removing current message
2020-02-27 07:51:15.522 Info, Node010, Sending (Send) message (Callback ID=0x45, Expected Reply=0x04) - SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x45, 0xa9
2020-02-27 07:51:15.522 Info, Node010, Encrypted Flag is 0
2020-02-27 07:51:15.530 Detail, Node010, Received: 0x01, 0x04, 0x01, 0x13, 0x01, 0xe8
2020-02-27 07:51:15.530 Detail, Node010, ZW_SEND_DATA delivered to Z-Wave stack
2020-02-27 07:51:15.575 Detail, Node010, Received: 0x01, 0x18, 0x00, 0x13, 0x45, 0x00, 0x00, 0x05, 0x01, 0xb3, 0x7f, 0x7f, 0x7f, 0x7f, 0x01, 0x01, 0x03, 0x17, 0x00, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x11
2020-02-27 07:51:15.575 Detail, Node010, ZW_SEND_DATA Request with callback ID 0x45 received (expected 0x45)
2020-02-27 07:51:15.575 Info, Node010, Request RTT 53 Average Request RTT 71
2020-02-27 07:51:15.576 Detail, Node010, Extended TxStatus: Time: 50, Hops: 1, Rssi: -77 --- --- --- ---, AckChannel: 1, TxChannel: 1, RouteScheme: Last Working Route, Route: 23 0 0 0, RouteSpeed: 40K, RouteTries: 1, FailedLinkFrom: 0, FailedLinkTo: 0
2020-02-27 07:51:15.576 Detail, Node010, Expected callbackId was received
2020-02-27 07:51:18.868 Detail, Node010, Received: 0x01, 0x25, 0x00, 0xf8, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21
2020-02-27 07:51:25.523 Error, Node010, ERROR: Dropping command, expected response not received after 1 attempt(s). Command: "SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x45, 0xa9"
2020-02-27 07:51:25.523 Detail, Node010, Removing current message
2020-02-27 07:51:25.523 Detail, Node010, Notification: Notification - TimeOut
2020-02-27 07:51:33.401 Info, Node010, Value::Set - COMMAND_CLASS_SWITCH_MULTILEVEL - Level - 0 - 1 - 255
2020-02-27 07:51:33.403 Info, Node010, SwitchMultilevel::Set - Setting to level 255
2020-02-27 07:51:33.403 Info, Node010, Duration: Default
2020-02-27 07:51:33.403 Detail, Node010, Queuing (Send) SwitchMultilevelCmd_Set (Node=10): 0x01, 0x0b, 0x00, 0x13, 0x0a, 0x04, 0x26, 0x01, 0xff, 0xff, 0x25, 0x46, 0xad
2020-02-27 07:51:33.403 Detail, Node010, Queuing (Send) SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x47, 0xab
2020-02-27 07:51:33.403 Info, Node010, Sending (Send) message (Callback ID=0x46, Expected Reply=0x13) - SwitchMultilevelCmd_Set (Node=10): 0x01, 0x0b, 0x00, 0x13, 0x0a, 0x04, 0x26, 0x01, 0xff, 0xff, 0x25, 0x46, 0xad
2020-02-27 07:51:33.403 Info, Node010, Encrypted Flag is 0
2020-02-27 07:51:33.411 Detail, Node010, Received: 0x01, 0x04, 0x01, 0x13, 0x01, 0xe8
2020-02-27 07:51:33.411 Detail, Node010, ZW_SEND_DATA delivered to Z-Wave stack
2020-02-27 07:51:33.457 Detail, Node010, Received: 0x01, 0x18, 0x00, 0x13, 0x46, 0x00, 0x00, 0x05, 0x01, 0xb1, 0x7f, 0x7f, 0x7f, 0x7f, 0x01, 0x01, 0x03, 0x17, 0x00, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x10
2020-02-27 07:51:33.457 Detail, Node010, ZW_SEND_DATA Request with callback ID 0x46 received (expected 0x46)
2020-02-27 07:51:33.457 Info, Node010, Request RTT 53 Average Request RTT 62
2020-02-27 07:51:33.457 Detail, Node010, Extended TxStatus: Time: 50, Hops: 1, Rssi: -79 --- --- --- ---, AckChannel: 1, TxChannel: 1, RouteScheme: Last Working Route, Route: 23 0 0 0, RouteSpeed: 40K, RouteTries: 1, FailedLinkFrom: 0, FailedLinkTo: 0
2020-02-27 07:51:33.457 Detail, Node010, Expected callbackId was received
2020-02-27 07:51:33.457 Detail, Node010, Expected reply was received
2020-02-27 07:51:33.457 Detail, Node010, Message transaction complete
2020-02-27 07:51:33.457 Detail, Node010, Removing current message
2020-02-27 07:51:33.457 Info, Node010, Sending (Send) message (Callback ID=0x47, Expected Reply=0x04) - SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x47, 0xab
2020-02-27 07:51:33.457 Info, Node010, Encrypted Flag is 0
2020-02-27 07:51:33.466 Detail, Node010, Received: 0x01, 0x04, 0x01, 0x13, 0x01, 0xe8
2020-02-27 07:51:33.466 Detail, Node010, ZW_SEND_DATA delivered to Z-Wave stack
2020-02-27 07:51:33.512 Detail, Node010, Received: 0x01, 0x18, 0x00, 0x13, 0x47, 0x00, 0x00, 0x04, 0x01, 0xb1, 0x7f, 0x7f, 0x7f, 0x7f, 0x01, 0x01, 0x03, 0x17, 0x00, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x10
2020-02-27 07:51:33.512 Detail, Node010, ZW_SEND_DATA Request with callback ID 0x47 received (expected 0x47)
2020-02-27 07:51:33.512 Info, Node010, Request RTT 54 Average Request RTT 58
2020-02-27 07:51:33.512 Detail, Node010, Extended TxStatus: Time: 40, Hops: 1, Rssi: -79 --- --- --- ---, AckChannel: 1, TxChannel: 1, RouteScheme: Last Working Route, Route: 23 0 0 0, RouteSpeed: 40K, RouteTries: 1, FailedLinkFrom: 0, FailedLinkTo: 0
2020-02-27 07:51:33.512 Detail, Node010, Expected callbackId was received
2020-02-27 07:51:39.746 Info, Node010, Value::Set - COMMAND_CLASS_SWITCH_MULTILEVEL - Level - 0 - 1 - 255
2020-02-27 07:51:39.746 Info, Node010, SwitchMultilevel::Set - Setting to level 255
2020-02-27 07:51:39.746 Info, Node010, Duration: Default
2020-02-27 07:51:39.746 Detail, Node010, Queuing (Send) SwitchMultilevelCmd_Set (Node=10): 0x01, 0x0b, 0x00, 0x13, 0x0a, 0x04, 0x26, 0x01, 0xff, 0xff, 0x25, 0x48, 0xa3
2020-02-27 07:51:39.746 Detail, Node010, Queuing (Send) SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x49, 0xa5
2020-02-27 07:51:41.227 Info, Node010, Value::Set - COMMAND_CLASS_SWITCH_MULTILEVEL - Level - 0 - 1 - 0
2020-02-27 07:51:41.227 Info, Node010, SwitchMultilevel::Set - Setting to level 0
2020-02-27 07:51:41.227 Info, Node010, Duration: Default
2020-02-27 07:51:41.227 Detail, Node010, Queuing (Send) SwitchMultilevelCmd_Set (Node=10): 0x01, 0x0b, 0x00, 0x13, 0x0a, 0x04, 0x26, 0x01, 0x00, 0xff, 0x25, 0x4a, 0x5e
2020-02-27 07:51:41.227 Detail, Node010, Queuing (Send) SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x4b, 0xa7
2020-02-27 07:51:43.458 Error, Node010, ERROR: Dropping command, expected response not received after 1 attempt(s). Command: "SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x47, 0xab"
2020-02-27 07:51:43.459 Detail, Node010, Removing current message
2020-02-27 07:51:43.459 Detail, Node010, Notification: Notification - TimeOut
2020-02-27 07:51:43.459 Info, Node010, Sending (Send) message (Callback ID=0x48, Expected Reply=0x13) - SwitchMultilevelCmd_Set (Node=10): 0x01, 0x0b, 0x00, 0x13, 0x0a, 0x04, 0x26, 0x01, 0xff, 0xff, 0x25, 0x48, 0xa3
2020-02-27 07:51:43.459 Info, Node010, Encrypted Flag is 0
2020-02-27 07:51:43.468 Detail, Node010, Received: 0x01, 0x04, 0x01, 0x13, 0x01, 0xe8
2020-02-27 07:51:43.468 Detail, Node010, ZW_SEND_DATA delivered to Z-Wave stack
2020-02-27 07:51:43.514 Detail, Node010, Received: 0x01, 0x18, 0x00, 0x13, 0x48, 0x00, 0x00, 0x05, 0x01, 0xb1, 0x7f, 0x7f, 0x7f, 0x7f, 0x01, 0x01, 0x03, 0x17, 0x00, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x1e
2020-02-27 07:51:43.514 Detail, Node010, ZW_SEND_DATA Request with callback ID 0x48 received (expected 0x48)
2020-02-27 07:51:43.514 Info, Node010, Request RTT 54 Average Request RTT 56
2020-02-27 07:51:43.514 Detail, Node010, Extended TxStatus: Time: 50, Hops: 1, Rssi: -79 --- --- --- ---, AckChannel: 1, TxChannel: 1, RouteScheme: Last Working Route, Route: 23 0 0 0, RouteSpeed: 40K, RouteTries: 1, FailedLinkFrom: 0, FailedLinkTo: 0
2020-02-27 07:51:43.514 Detail, Node010, Expected callbackId was received
2020-02-27 07:51:43.514 Detail, Node010, Expected reply was received
2020-02-27 07:51:43.514 Detail, Node010, Message transaction complete
2020-02-27 07:51:43.514 Detail, Node010, Removing current message
2020-02-27 07:51:43.514 Info, Node010, Sending (Send) message (Callback ID=0x49, Expected Reply=0x04) - SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x49, 0xa5
2020-02-27 07:51:43.514 Info, Node010, Encrypted Flag is 0
2020-02-27 07:51:43.522 Detail, Node010, Received: 0x01, 0x04, 0x01, 0x13, 0x01, 0xe8
2020-02-27 07:51:43.523 Detail, Node010, ZW_SEND_DATA delivered to Z-Wave stack
2020-02-27 07:51:43.569 Detail, Node010, Received: 0x01, 0x18, 0x00, 0x13, 0x49, 0x00, 0x00, 0x04, 0x01, 0xb1, 0x7f, 0x7f, 0x7f, 0x7f, 0x01, 0x01, 0x03, 0x17, 0x00, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x1e
2020-02-27 07:51:43.569 Detail, Node010, ZW_SEND_DATA Request with callback ID 0x49 received (expected 0x49)
2020-02-27 07:51:43.569 Info, Node010, Request RTT 54 Average Request RTT 55
2020-02-27 07:51:43.569 Detail, Node010, Extended TxStatus: Time: 40, Hops: 1, Rssi: -79 --- --- --- ---, AckChannel: 1, TxChannel: 1, RouteScheme: Last Working Route, Route: 23 0 0 0, RouteSpeed: 40K, RouteTries: 1, FailedLinkFrom: 0, FailedLinkTo: 0
2020-02-27 07:51:43.570 Detail, Node010, Expected callbackId was received
2020-02-27 07:51:53.515 Error, Node010, ERROR: Dropping command, expected response not received after 1 attempt(s). Command: "SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x49, 0xa5"
2020-02-27 07:51:53.515 Detail, Node010, Removing current message
2020-02-27 07:51:53.515 Detail, Node010, Notification: Notification - TimeOut
2020-02-27 07:51:53.516 Info, Node010, Sending (Send) message (Callback ID=0x4a, Expected Reply=0x13) - SwitchMultilevelCmd_Set (Node=10): 0x01, 0x0b, 0x00, 0x13, 0x0a, 0x04, 0x26, 0x01, 0x00, 0xff, 0x25, 0x4a, 0x5e
2020-02-27 07:51:53.516 Info, Node010, Encrypted Flag is 0
2020-02-27 07:51:53.523 Detail, Node010, Received: 0x01, 0x04, 0x01, 0x13, 0x01, 0xe8
2020-02-27 07:51:53.523 Detail, Node010, ZW_SEND_DATA delivered to Z-Wave stack
2020-02-27 07:51:53.570 Detail, Node010, Received: 0x01, 0x18, 0x00, 0x13, 0x4a, 0x00, 0x00, 0x04, 0x01, 0xb3, 0x7f, 0x7f, 0x7f, 0x7f, 0x01, 0x01, 0x03, 0x17, 0x00, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x1f
2020-02-27 07:51:53.571 Detail, Node010, ZW_SEND_DATA Request with callback ID 0x4a received (expected 0x4a)
2020-02-27 07:51:53.571 Info, Node010, Request RTT 54 Average Request RTT 54
2020-02-27 07:51:53.571 Detail, Node010, Extended TxStatus: Time: 40, Hops: 1, Rssi: -77 --- --- --- ---, AckChannel: 1, TxChannel: 1, RouteScheme: Last Working Route, Route: 23 0 0 0, RouteSpeed: 40K, RouteTries: 1, FailedLinkFrom: 0, FailedLinkTo: 0
2020-02-27 07:51:53.571 Detail, Node010, Expected callbackId was received
2020-02-27 07:51:53.571 Detail, Node010, Expected reply was received
2020-02-27 07:51:53.572 Detail, Node010, Message transaction complete
2020-02-27 07:51:53.572 Detail, Node010, Removing current message
2020-02-27 07:51:53.572 Info, Node010, Sending (Send) message (Callback ID=0x4b, Expected Reply=0x04) - SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x4b, 0xa7
2020-02-27 07:51:53.572 Info, Node010, Encrypted Flag is 0
2020-02-27 07:51:53.580 Detail, Node010, Received: 0x01, 0x04, 0x01, 0x13, 0x01, 0xe8
2020-02-27 07:51:53.581 Detail, Node010, ZW_SEND_DATA delivered to Z-Wave stack
2020-02-27 07:51:53.626 Detail, Node010, Received: 0x01, 0x18, 0x00, 0x13, 0x4b, 0x00, 0x00, 0x05, 0x01, 0xb1, 0x7f, 0x7f, 0x7f, 0x7f, 0x01, 0x01, 0x03, 0x17, 0x00, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x1d
2020-02-27 07:51:53.626 Detail, Node010, ZW_SEND_DATA Request with callback ID 0x4b received (expected 0x4b)
2020-02-27 07:51:53.627 Info, Node010, Request RTT 53 Average Request RTT 53
2020-02-27 07:51:53.627 Detail, Node010, Extended TxStatus: Time: 50, Hops: 1, Rssi: -79 --- --- --- ---, AckChannel: 1, TxChannel: 1, RouteScheme: Last Working Route, Route: 23 0 0 0, RouteSpeed: 40K, RouteTries: 1, FailedLinkFrom: 0, FailedLinkTo: 0
2020-02-27 07:51:53.627 Detail, Node010, Expected callbackId was received
2020-02-27 07:52:03.574 Error, Node010, ERROR: Dropping command, expected response not received after 1 attempt(s). Command: "SwitchMultilevelCmd_Get (Node=10): 0x01, 0x09, 0x00, 0x13, 0x0a, 0x02, 0x26, 0x02, 0x25, 0x4b, 0xa7"
2020-02-27 07:52:03.574 Detail, Node010, Removing current message
2020-02-27 07:52:03.574 Detail, Node010, Notification: Notification - TimeOut
It looks like Zwave2Mqtt asks the switch for a state which is not answered by the Duwi/Popp dimmer