What's up with Praetorians and Hydra?

I have seen things getting stuck there, but not to that extent.
And not sure which faction it was, though the map was definitely Hydra.

Yes, bosses tend to get stuck there, sometimes even the little guys like Hunters and Pyros.

Hydra definitely seems to have a corn cob up it's ass recently



(There's 2 of us, only me showing. Not the host).

This has happened as long as I can remember, even on console. Enemies get stuck on that spawn point frequently.

Smart players know to circle back to them at the end of the wave - one fewer enemy spawn to deal with. It's similar to the problems with Reactor when you get the "totem pole."

A godsend, most times.

In addition to the aforementioned spots, pretty much any pair of enemies can get stuck staring at each other when they (presumably) try to path past each other but neither will give way.

Very common with Atlases + humanoid Cerberus units.

Powers seem to work on them from everyone, and host can shoot at the top of the beam where they spawn and hit them.  

Hydra's landing zone is... special. Almost any enemy can derp out there (even alone). Biotic Charging to it is also not possible. Problem exists on both PS3 and PC, but is more pronounced on PC.
Enemies getting stuck inside each other (especially larger ones like Praetorian/Atlas) seems to be able to occur on almost any ramp in the game.
No officially released map seems to compare to Reactor for funky enemy behaviour though, that place is in a league of its own.

Would you believe that I've had about 3 instances of Condor failing to load people in, and none of the other bugs attributed to Condor have EVER happened to me? Neither on PS3, nor PC?

Rio is only buggy on PC It's pretty bug-free, if frustrating on PS3