Hello.
I don't know if this has been addressed before but when act II (and the following) starts and you have to start to take down vasudan bombers I have noticed how difficult it seems to take down an osiris. One would think that these ships are slow and easy to kill but they appear to have a major bug with their hitbox as every weapon seems to do minimal damage or just shoot through the model. At exception that if you aim in a weird position like where the shield quadrants are they get hit and their hull goes down 1-3. This happens regularly to each single osiris and I've even seen F-beams go through the model itself.