There seems to be a timing problem with Executioner triggering towards the end of turn when animation cancelling is enabled. I tested this multiple times, these issues are not there when the setting is disabled.
What I encountered in detail:
- Sometimes if I kill someone with a skill or basic attack that would leave me with no ap, the tooltip for +2 AP appears but the turn ends anyway.
- Weirder one. One time I got the 2 AP. I was enraged before the the shot that triggered Executioner, and the icon next to the character showed I was still enraged after. The next shot didn't crit. (I reloaded the turn, disabled animation cancelling, played the same moves and I critted on the last shot)