PLEX movie issue - CPU death spiral

I think I’ve also started experiencing the issues in this thread, for me since around Christmas.
I’d raised my own thread but was pointed here

Are there any bandaids to the solution? I see mentioned to use the legacy movie agent? Is that literally the “Plex Movie (Legacy)” or is it “The Movie Database” agent?
I swapped to it and refreshed everything but was still having issues. I’ve just done the plex dance with all my movies and waiting for them to scan back in before i try to see if any files are failing again.