Bug after rs451 update

I have rs451 and ra280, connected via xlr. This my story - Yesterday updated rs451 to newest firmware, and very disappointed its with bugs. Then connected to phone by blutetooth no sound! Testet from tv via optical
No sound! Turned off waited for some time - tryed to work - sounds appeared but very low, looks like on 50% like 20% earlier. Tryed to find solution - changed sourse by mechanical swith on front in rs451 and then back, sound volume was restored like earlier. But still not working correctly- then changing source from optical and Bluetooth getting no sound! Back to bluetooth no sound :(, its really something with firmware, can it be fixed or how to return to previous. Or how to fix is nonsense each time switching sources few time to get a sound.