Performance problems

Currently, I am trying to edit a video. All clips are in HD. However, I created a slow-motion scene (from 100% to 30%), and now I am experiencing performance problems.

Here are the issues I'm facing:

• When I press play, the blue bar does not move.
• When I delete or move a clip in the timeline, it still shows until I click on another clip.
• When I switch from the normal Workspace to Coloring and back to normal, the Timeline and the Effects panel are missing.

I deleted the slow-motion clip, but the problem persists.

Steps I have taken:

• Deleted the clip
• Restarted the PC
• Cleared the media cache

But the problem is still there (only in this project). I am unable to complete the video in this situation. HELP!

One more thing to note: when I close Premiere (this project), a window pops up saying "Waiting for Library writing." I haven't seen this before. It looks like a big file, but it isn't.

My System:

Windows 10 (all latest uptdates)
AMD Ryzen 9 5900X - 12-Core

NVIDIA RTX 3060

32 GB RAM

Premiere Pro 24.4.1 (Build 2)

Sven

*** short update ***

In Premiere Pro 24.6.0 BETA (Build 8), it works fine. So the problem is definitely in Premiere Pro, not my files.