Captions bug when adjusting duration.
Using Open captions.
I'm experiencing a bug when I go back to adjust the length of captions.
I need to make several long captions shorter. When I go to drag the ends of the caption to shorten or lengthen it, it disappears, setting its duration to 0, the only way I can adjust them is by dragging the time code in the Captions window. Which is slow and tedious.
I think one of the best caption tools I have seen is Youtube's captioning tools. Which highlight the captions as you scrub through, and allow you to use the space bar to split a caption in two.

We have completely redesigned the captioning workflow in Premiere Pro version 15.0. You will see many dramatic workflow improvements. Please update to the latest version.
Learn all about the new captions workflow here: https://helpx.adobe.com/premiere-pro/user-guide.html/premiere-pro/using/working-with-captions.ug.html
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Elettra Fiumi commented
Has there been any reply on this? I'm facing the same problem.