The srt has 965 captions; imports fine to a new project. I placed it on a sequence created from a 26 minute 1920x1080 h.264 file. I added a second instance of the video to fill extend the length of the captions. I get DELAYS in simple selection/editing of captions. (This is the first time I have been able to create this problem.) The delays do not always happen, but a large percentage of the time. Some are very short delays. Others are long enough that I see the spinning cursor circle. I can get a delay when simply clicking to another point in the timeline - the previous caption stays on the screen until the switch occurs. Double clicking to edit may result in a delay before the text is highlighted.
I get the delays whether editing in the Text Panel or the Timeline. Some users have reported that avoiding the Text Panel helps.
I'll try to experiment further now that I can replicate this.
Stan
Thank you for this. Closing the text panel solved this lag for me. Just switching to another tab in the same panel doesn't work, the entire panel needs to be completely closed. I was doing a workaround where I only worked with about 100 caption segments at a time in a duplicate sequence, and cut/paste those back to the original sequence when done, or it would become too laggy. With hundreds of captions on the same timeline it would take 2+ seconds after I typed anything before the text would even appear on screen, which is obviously a major problem.
Since I have a keyboard shortcut for adding a new caption, I was able to safely close the panel until I need it again for exporting, and there's no lag at all anymore. Not with adding, typing, trimming, moving, etc. It all works perfectly again. So it's clearly the panel that's causing this issue. Hopefully this helps the team isolate what they need to patch to fix this issue.