This bug has been happening for a while but I just nailed down how to reliably recreate it:
https://youtu.be/mLAqC1yO0ZE If you transpose an arpeggio and switch back to sequence mode with turning off transpose, the transposition state of that track is corrupted until the Keystep Pro is power cycled.
I feel that this bug is really bad because it tends to occur when you are jamming out ideas and if you trigger it when you have unsaved pattern data present you are left with the choice of saving in a corrupted firmware state or power cycling the KSP and losing your material.