Edit: After a little bit of use I have noticed another issue. After installing some Homebrew (gPSP Kai, snex9xtyl and cavestory) into PSP>Game whenever I access the game segment of pyMenu it freezes after a few seconds. I've left this frozen for 5 minutes or so to see if anything will happen, but it just remains that way until Uno is restarted.
Since it's a freeze like that, and not BSoD, I'm not sure if pytrace would generate so I don't think there's really much more I can give you than that (unless you want a video or something specific).
Edit2: Just to clarify this is only happening in pyMenu. I've tested every other ARK Menu, and it hasn't been an issue.