Clip/sequence flashing thumbnails in timeline makes editing impossible [major bug]

Forgot to mention is also seems to be triggered when using the multi-cam view in the progmra monitor

Hi Kevin,

FYI, here are my settings (dealing with this problem again currently)-

Issue may have something to do with timeline audio render, as everytime I have to restart PP, I have to re-render the audio waveform. Footage is multicam with 2 video/audio and 1 add'l audio

System:

Mac Studio

Apple M2 Max

64GB Ram

Sonoma 14.5
Premiere 24.5.0 (Build 57)

Footage:
MP4, 3840 × 2160

Codecs: Linear PCM, H.264

Color Profile: HD (1-1-1)

The team requires more info. The status of the bug report has been updated.

Same issue here. I think you're onto something by noticing it's created through multicam clips. I've found using v22.2.0 is the only way I've been able to solve this.

I recently updated to v24.5 thinking it'd hopefully have a fix, but the problem still persists.

Yo! 

Been having the same issue here across multiple builds, also seems to only affect multicam. It happens on about 50% of the multicam projects I do. The fix is to close Premiere and open it back up, though sometimes just closing the project will do it I think.

I'm on 

Mac Studio

Apple M2 Max

64GB Ram

Sonoma 14.2.1
Premiere 24.2.1

Yep pretty much the only way I can work now is by downgrading using the online Premiere Pro project downgrader to PP2022, then editing a multicam sequence, then opening that project in PP2023 (for things like warp stabilizer that doesn't require pre-rendering and transcripts). As long as I don't touch any of the nested clips it'll work. But then the bug will kick back in and I'll have to rinse and repeat and downgrade again. It's a huge pain in the ass.

I have the same problem and it has made Pr completely unusable. Completely. Adobe needs to address this NOW

Morning update for anyone who is watching this... now it appears to be completely arbitrary as to what is flashing. I edited the audio from one clip (back in PP2023) and now not only are some parts of those clips flashing but now clips from a completely disconnected multicam sequence are flashing too. What's weird is that if you look at the timeline when I scroll, the blue clips to the right are from the same camera source as the ones flashing, but they're not flashing. And there are clips to the left completely disconnected from the source that I made an edit on (the steering wheel thumbnails) that are now flashing even though they were not edited in any way.

Is there anyone from @adobe that might be able to check in on this?

So crazily enough... the part that's flashing here was the stuff I edited in Premiere 2022 (22.6.4) where I had absolutely ZERO issues doing a multicam sequence and cutting it together with no hiccups or problems whatsoever. After editing multicam, just for the heck of it I flattened the sequence, saved a copy of the project, then opened it in Premiere 2023 (23.6.0) where the very edit that had been created in multicam was now flashing right on project open. 

You can see my mouse highlight it, where it briefly stops flashing, but then starts right on flashing again. Can't play or make any changes to the timeline while it is flashing. I have to force quit Premiere then reopen. As soon as I make any edits to any (formerly) multicam sequence, that whole section will start flashing. It's got to be related to the clip itself but it's clearly not corrupted as it worked just fine in Premiere 2022.

ugh.

Well, a little update. After trying all the 2023 versions of Premiere, when I got to Premiere 2022 (22.6.4) the problem went away. So there's some code or logic for Adobe to check on... apparently Multicam sequences in 2023 versions get some sort of bug where they attempt to continuously update thumbnails in the timeline even when the multicam sequence is flattened.

At least now I can continue to work... and I'll just try and get back to 2023 version whenever I finish the main edit. Missing the transcription features a lot though, that made editing so much easier. 😕😕