Mmm interesting, might be an emulator issue? I never encountered this during testing on real hardware...
Yeah it could very well be a PEBCK category.
Stability of the game is not affected, and it only has happened a few times. No frustrations at all. Enjoying the game a lot! On my end, I always have the option of trying the prg to see if it never has the thawable freeze.
I guess, it could be a problem of the older VICE v2.4 version, the C64Mini uses.