Thank you! You found the keyboard disconnect bug that’s been around so long. I just checked and while guu’s code has 10000, mine had 100000 in mmc_stm32.c where the SLOW option is being handled. I somehow missed that when I updated to newer RCs of PicoMite.
I’m doing a test build now and once I check that I’ll push it up to git and put a new set of release files for download. I’ve also got changes to fix the key assignments you highlighted in the other thread. I had already fixed DEL as you had mentioned, but I’ve also added fixes for ALT, and the SHIFT modified ones you pointed out.
EDIT:
An updated release is available here, with the i2c timing fix and the keyboard mapping fixes.