This reminds me of something.
A while ago I exported a video and found out that there were weird glitches (not really freezing) where I used a certain filter (don’t remember which one though). The solution to that problem was to disable Parallel Processing in the Export panel.
Maybe you can try and see if that will work for you.
I have not experienced that but also I do not work with game captures like a lot of people. No one else complained yet either, and there have already been over 60,000 downloads for that version alone!