Premier Rush on Android glitches the lat 2 minutes of videos. Source files are fine

This is for videos that are 10 minutes long. Everything is fine and then suddenly the last 2 minutes start glitching/slipping like crazy and ruin what would have been a good video otherwise. In addition, it shows that it's synced to the cloud, but it's not showing up in CC for me. So I can't render it on my desktop either. I have plenty of memory and I did reboot the phone and app several times and even re-imported the source file. None of it changed anything in the 5 different times I  exported the video after making changes. I'm beginning to think that Rush is only good for 3-minute videos and that it's a waste of my time to fuss with it. This is on Android Samsung S21 Ultra.

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