Its not necessarily that he changed something. FOR YEARS, this has happened randomly, and its usually for characters with high level AI. they just break out and take over the character. The only cure for this is to figure out which AI trigger is taking over. which is impossible. Also judging from the names of the characters in that list. All of them are super Over powered and cheap, and those are the ones that would most likely break out and play for you.
I considered that, but wall bounce is mostly enemy postion , when you corner them the enemy back edge dist is close to 0 (0 meaning the wall) so be wall bouncing them while close to the wall regardless of direction is triggering it to bounce them off the wall.