Fri Jun 25, 2021 10:49 pm
I experienced a very similar bug when using Resolve 17.2. One audio track would randomly mute for no apparent reason, and the "mute" button on the edit page timeline would not light up. However, the mute button on the edit page mixer WOULD light up. Very frustrating, since I don't normally edit with the mixer open so would have no visible indication that I had lost a track.
However, knock on wood, I have not experienced this problem since updating to 17.2.1 (M1 Mac Mini, 16GB RAM, Mac OS 11.3 and possibly 11.4 - I can't remember if I updated the system before or after updating to Resolve 17.2.1).