That was my plan -- to start with those that require super user. They are listed in the magisk app and su can be removed from them there. I have about a dozen or so. And none of them are critical for day to day use, so I should be able to test it fairly easily.
If that doesn't work, I will find an app to show me running processes/apps, and after a freeze, I will capture what was running (especially those running hidden in the background that I didn't launch). I can try disabling some of those.
Of course, it isn't an issue I can reproduce, so it might take some time to track down th