Shelly Binding: Warnings in Log

Hi, I have 10 Shelly 2.5 acting as RollerShutter, but one of them creates a lot of warnings.

2021-12-14 12:38:04.026 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler ShellyRelayHandler of thing shelly:shelly25-roller:rollerWohnzimmerRechts tried checking if channel device#heartBeat is linked although the handler was already disposed.

2021-12-14 12:38:04.041 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler ShellyRelayHandler of thing shelly:shelly25-roller:rollerWohnzimmerRechts tried checking if channel device#uptime is linked although the handler was already disposed.

2021-12-14 12:38:04.041 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler ShellyRelayHandler of thing shelly:shelly25-roller:rollerWohnzimmerRechts tried checking if channel device#wifiSignal is linked although the handler was already disposed.

Any hints, why are there so much warnings? They appear every minute.