Diagnostic 520463197

Sonos beam is connected to a onn. 32" Class HD (720P) LED Roku Smart TV through HDMI cable. It intermittently disconnects from the TV. The TV remote still works and the light blinks on the sonos if I adjust the volume but then sound is not working. Sometimes it will start working again and other times it does not. 
The setting for audio is the beam, it is not set up automatically choose audio. The connection is HDMI. I was told from the prior owner this was an issue he had with the beam and his TV. 
is there something I can do to fix this issue? All products are up to date. All products were have been power cycled. There are no other products connected to the TV. 
the beam doesn’t seem to give me any issues when I use music through the sonos app.