Found a missing texture in the first level in the teleporter room (there's a wall on the other side):
and in the same level, there's a weird geomtetry displacement that wasn't there before:
Also, dunno if it's a bug too, but I wanted to experiment with making a map recreating the famous "Into The Abyss" level from Titanfall 2, and run in this effect in which the other side of the mesh becomes traslucent for no reason when it isn't supposed to do that: