Game crashed, reloaded and bug momma's first two doors are already open with no bug to kill, boss spawns, get hp down, open a door and cause her to spawn again, get hp down, no bugs to kill, can't progress. 

Also as seen in screenshots, the boss has no model, it's stuck onto my players body and freaking out. 

Jankiest I've ever seen in a predominantly smooth game.

Empty turret spots had Comrade's ultimate turret shape on them until I built on them and it eventually disappeared. 

Blaze's model and textures exploded all over the screen until going into a certain room. 

Containers/shopkeeper/medkit station invisible