Transcription Slowing Down Processing

Basically all the posts I can find about transcription talk about the transcription process itself being slow. But, that's not all that important to me. The help I need comes once it is processed.

I am finding that working with a large transcribed clip (1080, pro res, 1hr40min) is slowing my system in a big way. Often at times when I want it to be moving quickly (simple scrubbing, play/pause to mark and out point, etc). Even when I don't have the text panel highlighted (or even as an open panel at all), just scrubbing that clip either in the source monitor or the timeline drags everything. Transcript is useful, of course, but I need to be able to do the basic functions of editing while using the clip.

I clicked "Ignore transcript" for the clips in the timeline, and that seemed to help on the timeline. And I see I can uncheck that if needed, which is great. But in the source window there's no such toggle. Nor in the project panel for that clip.

I've got a decent system, Mac Studio M1 Ultra, 64GB RAM, Sonoma OS, running Premiere 2024 24.1.0 (build 85) which the CC app says is most current.

Anybody have experience/ideas here? Thanks very much.