Premiere Pro sequence issue after 25 update, sequence out of sync, clips shifted

[danaxia]

Hello, I'm currently working on a documentary and after updating Premiere to the latest version (25) some clips are out of sync and shifted in time. Looks like its interpreting some footage at a different frame rate or sample rate, although the image is also shifted. I can hear audio bits out of place and weird cuts start happening here and there.
I've downloaded the old version of Premiere 24 and opened an old auto save made also in Premiere 24, there I can see the sequence is identical to the one in V .25 and works perfectly. Once I try to open that old project into the new Premiere 25 the problem shows again. I have a ton of work done by now on the new version of Premiere and my project is now a mess after the update, what can I do to fix this?

I'm working on proxies on a laptop

MacBook Air

m2

24 gb ram

Sonoma 14.0

[Rach McIntire]

Hi @danaxia,

Welcome to the Premiere Pro forums!  We’re happy you’ve reached out. That sounds super frustrating.  Can you tell me what type of video file are you working with?  Are they .mts files?  We’ll need a bit more info to try to help with your issue. Please see: How do I write a bug report?  I hope we can help you soon.

[danaxia]

Hi Rach, I'm working with mp4 proxy files created in Premiere, in the laptop I'm currently working I only have the mp4 proxies. Is affecting some clips only for some reason.

[Rach McIntire]

Hi @danaxia,
Can you show the clip properties using the Media Info app in the tree view? Mp4 doesn't give enough information about the clip. Can you provide a problem clip for us to test with?

[danaxia]

Hi Rach.

Thanks for your time!

 I have a project with media of a small sample of the edit where the problem is happening. How can I share it with you?

Again, thanks for your time

[Rach McIntire]

PM'd you.

[danaxia]

I just PM'd a link.

Thanks!

[Dani_V. · Accepted solution]

Update: Toggle Proxies button has to be enabled. There was a sample rate mismatch between the attached proxies and original camera footage causing the appearance of sync issues when original media was offlined. Ensuring proxies are toggled on fixes the discrepancy.