Hello,
Thanks rossko57 for hint.
I changed thing from discovery to manual configuration and lines with ( *changed from NULL to NET RADIO) dissapeared.
So it looks like there is problem with thing discovery in newest test version. I had also problems with other bindings, like MQTT, MIIO (things were disappearing after restart).
So i am moving to manual thing configuration.
but
errror:
2020-01-07 10:42:24.342 [me.event.ThingUpdatedEvent] - Thing 'yamahareceiver:zone:9ab0c000_f668_11de_9976_00a0dedd9906:Main_Zone' has been updated.
still is in logs (every 2 seconds). Even nothing is changing (yamaha receiver is off).
Looks like this is connected to info from Tomasz: