Premiere Pro Beta - Error in new Sequence

Hey guys,

so i've been testing the PP Beta and it works pretty good. Besides some little bugs i could not identify sth, that would make me go back to the old Version. The new features (e.g. enhance Speech etc...) make it very appealing for a guy like me.

But i've come to an error, that i cannot find any solution for it:

- I've got a project where i edited in a 4k 16:9 sequence a video for a client

- After editing the video in 16:9 i needed to make social media content so i created a new sequence 4x5 and just copied the video/edits from the other's sequence timeline and pasted into the new one

- on the first day i removed the zoom effects and made them again for the 4x5 format etc... and everything worked

THE PROBLEM: Since yesterday everytime i load the sequence after scrolling thorught the frames it gets stuck on the frames and i cannot play anything in the timeline. I can move the cursor and the frames, but the timeline gets stuck and i'm not able to see any video, since it is stuck in one frame.

Video: https://www.youtube.com/watch?v=X_-tI4RpwM0&ab_channel=Isac

Has anyone got a solution for this? Or even any tips, so i can improve my workflow if i'm missing on sth when creating a Social Media Video format and copying it from one sequence to the new one?

kind regards,

Isaque da Silva