Yamaha Binding failes after some time

Hi
I’m using OH 2.4.0~20180616001001 and the latest yamaha binding for my Yamaha RX-V473. When I restart OH everything works fine, but after some time (at least once a day) the yamaha binding stops working, although it show ONLINE state:


smarthome:things list |grep -i yamah
yamahareceiver:yamahaAV:5f9ec1b3_ed59_1900_4530_00a0de915864 (Type=Bridge, Status=ONLINE, Label=Yamaha Receiver RX-V473, Bridge=null)
yamahareceiver:zone:5f9ec1b3_ed59_1900_4530_00a0de915864:Main_Zone (Type=Thing, Status=ONLINE, Label=RX-V473 Main_Zone, Bridge=yamahareceiver:yamahaAV:5f9ec1b3_ed59_1900_4530_00a0de915864)

A bundle restart doesn’t solve the problem, but an openhab restart.

I also get messages like this.

2018-06-16 09:31:44.295 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler tried updating the thing status although the handler was already disposed.
2018-06-16 09:31:56.049 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler of thing yamahareceiver:yamahaAV:5f9ec1b3_ed59_1900_4530_00a0de915864 tried updating channel power although the handler was already disposed.
2018-06-16 09:31:56.050 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler tried updating the thing status although the handler was already disposed.
2018-06-16 09:32:09.333 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler of thing yamahareceiver:yamahaAV:5f9ec1b3_ed59_1900_4530_00a0de915864 tried updating channel power although the handler was already disposed.
2018-06-16 09:32:09.334 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler tried updating the thing status although the handler was already disposed.
2018-06-16 09:32:44.305 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler of thing yamahareceiver:yamahaAV:5f9ec1b3_ed59_1900_4530_00a0de915864 tried updating channel power although the handler was already disposed.
2018-06-16 09:32:44.307 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler tried updating the thing status although the handler was already disposed.
2018-06-16 09:32:56.115 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler of thing yamahareceiver:yamahaAV:5f9ec1b3_ed59_1900_4530_00a0de915864 tried updating channel power although the handler was already disposed.
2018-06-16 09:32:56.116 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler tried updating the thing status although the handler was already disposed.
2018-06-16 09:33:09.934 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler of thing yamahareceiver:yamahaAV:5f9ec1b3_ed59_1900_4530_00a0de915864 tried updating channel power although the handler was already disposed.
2018-06-16 09:33:09.935 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler tried updating the thing status although the handler was already disposed.
2018-06-16 09:33:44.324 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler of thing yamahareceiver:yamahaAV:5f9ec1b3_ed59_1900_4530_00a0de915864 tried updating channel power although the handler was already disposed.
2018-06-16 09:33:44.325 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler tried updating the thing status although the handler was already disposed.
2018-06-16 09:33:56.130 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler of thing yamahareceiver:yamahaAV:5f9ec1b3_ed59_1900_4530_00a0de915864 tried updating channel power although the handler was already disposed.
2018-06-16 09:33:56.131 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler tried updating the thing status although the handler was already disposed.
2018-06-16 09:34:09.944 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler of thing yamahareceiver:yamahaAV:5f9ec1b3_ed59_1900_4530_00a0de915864 tried updating channel power although the handler was already disposed.
2018-06-16 09:34:09.945 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler tried updating the thing status although the handler was already disposed.
2018-06-16 09:34:44.339 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler of thing yamahareceiver:yamahaAV:5f9ec1b3_ed59_1900_4530_00a0de915864 tried updating channel power although the handler was already disposed.
2018-06-16 09:34:44.340 [WARN ] [.core.thing.binding.BaseThingHandler] - Handler YamahaBridgeHandler tried updating the thing status although the handler was already disposed.


I’ve no idea what goes wrong. Hope you can help.

Regards Michael