bob301
I haven't figured out how I swiped it into muteness without knowing about the Mute Tool,
If it's what I constantly encounter, it's a bug. When there are already takes in Take lanes and when I try to record additional takes in the same section or record new takes in an overlapped section using the Comping recording mode, I often see the waveforms in the existing takes become the outlines-only state immediately after I hit R to start recording. What the Comping mode is supposed to do is mute the existing
clips, not the
waveforms in them (hence a bug). This is why I started using the Mute tool (which I didn't know before, like you), in order to unmute the waveforms muted.