Good grief, editing subtitles on Premiere is a frustrating experience.
Without reason key taps becoms shortcuts briefly, darting me all over the shop. I'm suddenly taken to the end of the timeline. Or a different timeline.
Editing text anywhere except the Captions window (time consuming and not practicle) is buggy, slow and frankly not up to release standard.
Before getting excited about flooding AI all over their products, it'd be good if they got the basics right first.