I'm on a 2019 Mac Pro and Premiere Pro is maxing out the CPU sometimes to +2,000% even when it's idle. I have audio waveform generation turned off so it's not doing that.
It happens after being in the project for a period of time. I can restart everything and that fixes it for a while but once I start working I'm right back to the same problem. Super laggy playback, takes forever to refresh when the playhead is moved, etc.
[Moderator note: title edited for clarity to get quickest response.]
Sorry about this. Have you fixed the issue yet? It sounds like a corrupt sequence or project. Can you try copying and pasting the clips into a new sequence? If that is not working, you can create a new project and import the elements from the previous project into it. Try these things and let us know if it works out.