Shelly BLU Motion and DW sensor do not update after some time

[parachutesj]

I have a Shelly BLU motion sensor which is auto discovered and when configured it seems to be ok. However after a few updates it seems to freeze in OpenHab. No updates on the channels. I can see the messages arrive when looking in the script log of the Bluetooth gateway (e.g Motion changes from 0 to 1 or vice versa).

shelly_notification:208 Event from script:1: {"component":"script:1","id":1,"event":"oh-blu.data","data":{"encryption":false,"BTHome_version":2,"pid":50,"Battery":100,"Illuminance":635,"Motion":1,"addr":"3c:2e:f5:bb:bd:0e","rssi":-67},"ts":1736880362.71}

Further down looking in the OH debug logs, I also see that the status update arrives:
2025-01-15 15:09:06.135 [TRACE] [helly.internal.api2.Shelly2RpcSocket] - shellyplus2pm-b8d61a8b8634 Shutter_AZ: Inbound Rpc message: {"src":"shellyplus2pm-b8d61a8b8634","dst":"openhab-192.168.178.31","method":"NotifyEvent","params":{"ts":1736950146.08,"events":[{"component":"script:1","id":1,"event":"oh-blu.data","data":{"encryption":false,"BTHome_version":2,"pid":103,"Battery":100,"Illuminance":600,"Motion":1,"addr":"3c:2e:f5:bb:bd:0e","rssi":-67},"ts":1736950146.08}]}} 2025-01-15 15:09:06.135 [TRACE] [ng.shelly.internal.api2.ShellyBluApi] - shellyblumotion-3c2ef5bbbd0e: ShellyEvent received: {"src":"shellyplus2pm-b8d61a8b8634","params":{"ts":1.73695014608E9,"events":[{"id":1,"ts":1.73695014608E9,"component":"script:1","event":"oh-blu.data","data":{"addr":"3c:2e:f5:bb:bd:0e","encryption":false,"BTHome_version":2,"pid":103,"Battery":100,"Illuminance":600,"Motion":1,"rssi":-67}}]}} 2025-01-15 15:09:06.136 [TRACE] [y.internal.handler.ShellyBaseHandler] - shellyblumotion-3c2ef5bbbd0e: Watchdog restarted (expires in 43260 sec) 2025-01-15 15:09:06.136 [DEBUG] [ng.shelly.internal.api2.ShellyBluApi] - shellyblumotion-3c2ef5bbbd0e: BluEvent received: {"src":"shellyplus2pm-b8d61a8b8634","params":{"ts":1.73695014608E9,"events":[{"id":1,"ts":1.73695014608E9,"component":"script:1","event":"oh-blu.data","data":{"addr":"3c:2e:f5:bb:bd:0e","encryption":false,"BTHome_version":2,"pid":103,"Battery":100,"Illuminance":600,"Motion":1,"rssi":-67}}]}} 2025-01-15 15:09:06.136 [DEBUG] [ng.shelly.internal.api2.ShellyBluApi] - shellyblumotion-3c2ef5bbbd0e: BLU event oh-blu.data received from address 3c:2e:f5:bb:bd:0e, pid=103 2025-01-15 15:09:06.136 [DEBUG] [y.internal.handler.ShellyBaseHandler] - shellyblumotion-3c2ef5bbbd0e: Channel sensors#motion updated with ON (type class org.openhab.core.library.types.OnOffType).

It seems all is good, only the channels won't get updates.
Basically I have 20 Shelly (wired) devices and all others work flawless. Only the BT ones. Also same behaviour with a Door/Window sensor. It gets correctly discovered, configured and after a few minutes the updates stop.

I made a fresh installation of OH 4.3.2 with only the shelly binding to verify if there is something else broken. No, same issue.
I then installed the latest dev build 4.3.5 with no luck

I recently found a Bluetooth Gateway (Theengs) which also ready the sensors and sends updates via MQTT. This works very well for the moment, so I can somehow rule out that the devices do not send updates as I am getting them via MQTT (mapped to different things and channels).

Let me know if you need more logs etc.

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