Final Cut Pro playback is choppy

Same here though I'm on a MacBook Air M1, 16 GB RAM. I had installed many Titles on each video clip and the text would flash several times per 5 second clip. Even worse, when I applied Ken Burns to a photo, the Ken Burns effect would also apply to the Title, which it never did before in the earlier versions and it shouldn't. Even changing the colour of the Title font required a more clicks that it did in earlier versions. I was so fed up, I deleted this update and reverted to my older version. Caution though: I can no longer access any of the updated libraries, as the earlier version does not recognise the format of the latest version. It's fine for me because I don't need to access them anymore, but this cold be a huge problem for someone else.

This is a user forum where FCP users try to help each other.

If you run an Etrecheck report after giving it Full Disk Access in System Preferences and then submit using the "Additional text" button below, the brain trust here might be able to help figure out what's going on with your setup.

Sorry, have already reverted to the earlier version of FCP so no longer have access to the timeline, just an exported version and the videos I took with my phone (see link above). I was using the Lower 3rd 3D Title. Not sure what else I can do to help you test?

Here's a video that shows the flashing Titles and incorrect Ken Burns affect applied to the Title, when it should only apply to the image. https://youtu.be/LViFxRdB56Y

Can you show the timeline? Can you give some exact information about the media and the titles so others can test what you’re seeing?