Convert Audio to Subtitles Not Working

In the beta release 1 and 2, I have failed to create subtitles using the standard method. It gets to about 2/3 done and freezes. I've left it for an hour on both a Macbook Pro M3 Pro and a hefty Windows PC with a 3080 and 120GB RAM, and both have had the same issue. If I click cancel, it then freezes and even after being left for another hour, it still remains stuck on that cancelling popup.