Which platform are you playing on? I'm surprised that it happened on Medium but that does help narrow the issue down a bit. I've been attempting to fix this issue but I've never once encountered the bug myself, despite how many people have reported it so far. Working hard to make sure it's solved by v0.20!
Viewing post in STRIP Battle Action Cards [Demo] comments
I'm playing on Windows, Yeah idk what it could be, the first time I was on a winning streak so don't think it has anything to do with the winning loosing mechanic. I would try to keep switching between difficulties on the same character to recreate it, it only happen when I switched difficulties. Either way I have wishlisted it cant wait till it drops, also do you plan to release a demo of it on steam?