Very nice, thank you for playing and recording it!
After watching this and also rewatching the part about it from last nights stream, im a bit stumped. Apart from the shaders, i had none of these strange behaviors i saw on your guys footage. The constant stuttering/rubberbanding in your video is completely new to me, just like the lighting flickering other people reported.
As for the enemy AI, thats where i put a lot of effort in to smoothen it out. Like each enemy only calls its update function every x frames, where x is also depending on the actual time the enemy activates. Also proper deactivation when they are out of sight for 10 sec and stuff like that. So overall i suspect some visual stuff being wrong right now, that is coincidentally not a problem on my computer :(
The fireball crash is just unfortunate. No idea what that could be. Immediately thought of the shader stuff too, but that only cause a short lag spike, not a crash.
Anyway, the suggestion for the doors is noted, seen this on the stream too. Maybe i'll put a timer on it and also change the hitbox for the opened door.