I've done some audio repair on a video clip that has already been edited into multiple sequences. I could open up each sequence 1 by 1 and select the clip, hit in point, copy the in point and paste it into the revised copy of the audio and then alt drag it or hit replace with clip, however, that would take forever with how many cuts there are from the source.
So instead, I made a sequence that has the original video with the revised audio paired to it. All settings match the original source clip, timecode most importantly. I hit the Replace With Clip > From Source Monitor - Match Frame, and to my surprise, it does not match frame. Sometimes it shoots out an error, "The source clip lacks sufficient head material to match to the desired frame." And other times it does replace the media, but totally ignoring the match frame part and just replaces it at the first frame of the video.
I've tried multiple different work arounds such as making it into a mutlicam sequence, experimenting with how many audio tracks are in the multicam sequence (which strangely enough was changing the timing of the replace clip, and did accurately replace all the clips once! but never again) Seemed like everytime I deleted another track, the timing would shift slightly.
I'm sure I could just rerender the source footage with the revised audio and replace it, but these are very large files and that would take a lot of extra rendering time that I don't have right now. Regardless of that, it should work as a nested sequence, just as a precomp would in After Effects. I have no clue why Premiere can not handle this, and it seems others have experienced this over the years with no real answer or fix.
I have been loosing my head on this one. In AE its as simple as "replace with precomp" if you want to change the source and having it update in all instances of the used clip, but in premiere there is no way and match frame replace is the closest option, but it appears to be bugged.