Z wave stick stuck initializing neighbors and switches stuck at initializing cache load

Hi all,

I have an aeotec gen 5 stick and 3 nano switches. These are usually working well but they seem to get stuck sometimes since updating to 0.80. This results in the switches not responding properly or at all. I have tried to find out what the problem is and apart from restarting the whole system a few times I can say that healing the z wave network, soft resetting the network and healing the nodes does not work. I get the following errors in the OZW and HA log file. Any help would be great.

OZW
2019-03-05 15:48:23.699 Detail, Node001, Queuing (Controller) Request Node Neighbor Update
2019-03-05 15:48:23.699 Detail, Node009, Queuing (Controller) Request Node Neighbor Update
2019-03-05 15:48:23.700 Detail, Node010, Queuing (Controller) Request Node Neighbor Update
2019-03-05 15:48:23.700 Info, Requesting Neighbor Update for node 1
2019-03-05 15:48:23.700 Detail, Node011, Queuing (Controller) Request Node Neighbor Update
2019-03-05 15:48:23.701 Detail, Node001, Queuing (Command) ControllerCommand_RequestNodeNeighborUpdate (Node=1): 0x01, 0x05, 0x00, 0x48, 0x01, 0x85, 0x36
2019-03-05 15:48:23.701 Detail, Notification: ControllerCommand - Starting
2019-03-05 15:48:23.703 Detail,
2019-03-05 15:48:23.703 Info, Node001, Sending (Command) message (Callback ID=0x85, Expected Reply=0x48) - ControllerCommand_RequestNodeNeighborUpdate (Node=1): 0x01, 0x05, 0x00, 0x48, 0x01, 0x85, 0x36
2019-03-05 15:48:24.704 Error, Node001, ERROR: Dropping command, expected response not received after 1 attempt(s)
2019-03-05 15:48:24.704 Detail, Node001, Removing current message
2019-03-05 15:48:24.704 Detail, Node001, Notification: Notification - TimeOut
2019-03-05 15:48:24.706 Detail, Notification: ControllerCommand - Error - Failed
2019-03-05 15:48:24.707 Info, Requesting Neighbor Update for node 9
2019-03-05 15:48:24.707 Detail, Node009, Queuing (Command) ControllerCommand_RequestNodeNeighborUpdate (Node=9): 0x01, 0x05, 0x00, 0x48, 0x09, 0x86, 0x3d
2019-03-05 15:48:24.707 Detail, Notification: ControllerCommand - Starting
2019-03-05 15:48:24.707 Detail,
2019-03-05 15:48:24.708 Info, Node009, Sending (Command) message (Callback ID=0x86, Expected Reply=0x48) - ControllerCommand_RequestNodeNeighborUpdate (Node=9): 0x01, 0x05, 0x00, 0x48, 0x09, 0x86, 0x3d
2019-03-05 15:48:25.708 Error, Node009, ERROR: Dropping command, expected response not received after 1 attempt(s)
2019-03-05 15:48:25.708 Detail, Node009, Removing current message
2019-03-05 15:48:25.708 Detail, Node009, Notification: Notification - TimeOut
2019-03-05 15:48:25.713 Detail, Notification: ControllerCommand - Error - Failed
2019-03-05 15:48:25.714 Info, Requesting Neighbor Update for node 10
2019-03-05 15:48:25.714 Detail, Node010, Queuing (Command) ControllerCommand_RequestNodeNeighborUpdate (Node=10): 0x01, 0x05, 0x00, 0x48, 0x0a, 0x87, 0x3f
2019-03-05 15:48:25.714 Detail, Notification: ControllerCommand - Starting
2019-03-05 15:48:25.715 Detail,
2019-03-05 15:48:25.715 Info, Node010, Sending (Command) message (Callback ID=0x87, Expected Reply=0x48) - ControllerCommand_RequestNodeNeighborUpdate (Node=10): 0x01, 0x05, 0x00, 0x48, 0x0a, 0x87, 0x3f