oh, yeah, this is a bug i had encountered as well before uploading on friday,
it's related to the 'safe fall' deaths characters can do where they'll land on their feet and stay at 1hp after being defeated, feral and katana are set to use that effect, as well as kiku in the basement ambush. there's an interaction happening when a clash is the killing blow where they don't get dropped from the combat list but are no longer an enemy, so it sort of locks up; you end up winning when time counts down due to time over and actually get score again for the KO
ty for the report/video though!