HDMI Arc- no sound

I recieved and setup a bp50 with my Samsung Frame TV, via HDMI Arc. The system is powered by a Fosi V3 amp. I also have an alexa echo dot into the line in source. All was working great for about a month. When the bp50 was set on ARC input, turning on the TV would automatically turn on the system and sound switched from TV speaker to receiver speakers. Now I get no sound from the receiver/ bookshelf speakers. The bp50 still powers on and sound source changes from TV to speaker, however no sound. Tried manually toggling TV settings back to TV speaker and back to receiver, but no luck. All works fine except for the no sound factor. Still getting beautiful sound from all other sources, including the Alexa (line in) and bluetooth.

Any suggestions… ? Thank you
MB

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