Minor changes in text-to-speech editor mess up all closed captions editing

Hi there,

so far I've been a silent reader who's found solutions from the discussions board whenever running into bumps. However, now I'm at a loss.

We are building a course that, to help non-native speakers follow, has closed captions whenever playing audio. For audio we are currently using the text-to-speech function (may still switch to imported audio files) which works fine. We then use the closed captions editor to align speech/silence and text. When hitting safe and looking at/listening to the slide, everything works as it should.

However, if I make a minor change in the text-to-speech editor, like adding or replacing one word, closed captions set back to their default state. Any alignments, any added or split captions are gone.

Has anybody had this problem before? Is there anything I can do about this? Except doing closed captions as the last thing before finalizing the project? Will I run into the same issue with imported audio files?

Any help is appreciated!