In the project timeline, you can click on the audio waveform in the Inspector, and the Viewer and timecode will jump to that point, although the playhead doesn't move. This also works with a synchronized multicam clip having separate multichannel audio -- you can skim the video by skimming the audio of any channel in the Inspector. It's useful to get constant visual feedback of the video that corresponds to the audio channel "skim point" -- especially with separate multichannel audio.
However if the MC clip is opened, the same synchronized multichannel waveforms appear in the Inspector but the Viewer does not respond to skimming separate audio. Yet in this case it's really needed since the UI will not display full height audio-only waveforms in the MC "timeline" unless thumbnails are disabled. For multicam you don't want thumbnails disabled, you need those to keep track of the video.
It creates this situation: MC clip with separate audio is opened, the UI "squashes" the timeline audio waveform to a tiny height, I look (or skim) the full-height waveforms in Inspector but the Viewer is dead. I can't tell where in the MC "timeline" this corresponds to. Unlike the project timeline you can't expand audio components in an opened MC clip. I suppose the rationale is they are in the Inspector. Yet the UI sync between the Inspector skim point and opened MC timeline is non-existent for audio-only clips.
I can observe the timecode revealed under the Viewer when I skim audio in the Inspector, then manually enter that via CTRL-P, then the playhead and Viewer will jump there. However the commands (unassigned by default) "Copy timecode" and "Paste timecode" will not work between audio skimmer and Viewer of an opened MC clip. So it has to be done fully manually.
Has anyone else noticed this? Is there a recommended solution? Is it a reasonable enhancement request for the "Inspector audio skimmer" for an opened MC clip having separate audio to control the Viewer like it does in the project timeline? From a UI standpoint it seems there should be more consistent and pervasive two-way synchronization between the Inspector audio waveforms and Viewer display.