I got the Kill Shot bug fixed in Build 40.
The delays should be shorter I think. I also have it set to "auto end" the level if all enemies are dead and all loot is picked up (including enemy drops).
I did not get a chance to figure out the auto critical issue. It's buried in the cover system and I didn't have the time to dig into it yet. Definitely will be resolved and probably in the nest build.
The disappearing characters are also a mystery. I'm hoping it's due to another bug i fixed but I'll try to reproduce it some more when I get some time.