Samsung soundbar hw990b
Samsung tv q70 (65")
I am using the soundbar over arc with a Samsung tv and randomly the sound will go down to volume level 10 and adaptive sound mode. Sometimes it takes a few seconds sometimes it might be several minutes. Also the soundbar display will constantly scroll "TV ARC"
Updated to latest firmware or TV and soundbar
Tried different hdmi cables
Tried intelligent mode on or off
Factory reset soundbar and connections
Powered off for three minutes and tried again
Tried changing mode from remote or TV or even smart things app and nothing sticks it will drop volume and change mode.