Do some rats/batties have broken hitboxes/being invincible

When I enter the sewers and fight bats, they don’t seem to take damage. I see that the damage signs appear (when you do 300/400/200 damage or whatever) but their health doesn’t go down?? This appears to most, if not all of the ratties/batties and makes farming annoying because you have to fight certain batties/ratties. They can deal damage to YOU, but you can’t to them. Here’s a video showing that only some of the enemies can be dealt damage:

Known, can’t do anything since devastating in RDC

Okay. It’s known. @WaterWolfX can you close this post?

Yeah this is known @Meta @WaterwolfX close plz

Known bug.