Haukke Manor Bug?

Its the second time that I entered Haukke Manor and the Enemys where on different Positions on the Screen as of my Roommate. We where both doing Haukke Manor together and I wasn't able to see a few Mobs. Some never apeared some where on other places and I couldn't attack them.
Was very irritating and very stressful for me beeing Tank.

The other Party members where not displayed too. The only person I was seeing was my roommate and all other Members where invisible...

Whats that? When I was playing Monk I haven't recogniced this bug but always when I enter as Tank it happens to me.

I have tried on two different PS3s.

Is this a known bug?
Or am I only unlucky?

It's a bug. I think the game just messes up loading models on occasion, but if it is happening often it would be best to report it in the Bug report section.

I've had the rare situation where a party member doesn't appear, but the game got another opportunity to load after a cutscene and he reappeared afterward. I've also had Garuda disappear on me but when she teleported away to summon the sisters, she reappeared.