Zwave qubino zmnhnd1 issues

Configuration Z-Wave
1

Hi
I added device qubino zmnhnd1 to my controller but 3 issues

  1. this have nothing with HA, but device once powered on with 230V provides a strange sound something like whistling on high freq

  2. i have no idea but when i operate device ie executing on/off after few commands it goes to status - Dead.

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2022-02-28T17:10:34.155Z CNTRLR [Node 004] The node did not respond after 1 attempts, it is presumed dead
2022-02-28 18:10:34.158 INFO ZWAVE: Node 4 is dead
2022-02-28T17:10:34.159Z CNTRLR [Node 004] The node is dead.
2022-02-28T17:10:34.160Z CNTRLR All nodes are ready to be used
2022-02-28 18:10:34.162 INFO ZWAVE: Controller status: Scan completed
2022-02-28 18:10:34.163 INFO ZWAVE: Network scan complete. Found: 4 nodes
2022-02-28T17:10:34.196Z CNTRLR [Node 004] ping failed: Failed to send the command after 1 attempts (Status No
Ack) (ZW0204)

mesh not working … I have controller → node 3 → node4 … so i do not understand why node4 which is positioned the far away from controller is not connected to node3 instead directly to controller?

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thanks