Yeah I suspected something like that, will fix tonight thanks 🙏
Not sure if it's the emu timing. Real hardware does not exhibit this issue. I can only get it sometimes with autoattach disk in VICE 🤔
Graphics corruption bug is still present in V1.1. Just change the CLI to a SEI after switching to game charset and all works fine, or use zero page adresses which are not used by the kernel IRQ $ea31. ($80... is a bad idea).
https://sta.c64.org/cbm64mem.html