Crazy dungeon experience

Just got Qarn in low level roulette and had the weirdest dungeon run I've ever had in this game.
Firstly, the first boss split into two about halfway through the fight (Obviously been taking some tips from T1!) but no one else could see it. It didn't do anything, but It kept switching my target onto it. He stayed there for a while after we actually killed the boss too.

Then at the last boss the door didn't lift for me so I couldn't walk into the boss room. I tried returning, but there was no shortcut, so I had to run all the way back. Still couldn't get in so I tried activating the side doors. It did nothing but we let the spawned adds kill me so the healer could raise me in the boss room.

This worked and I got in some hits, but during the fight I kept running into invisible walls and I couldn't target the boss or adds for most of the time, as they weren't in my line of sight apparently.

Anyone else have any experiences like this?

Not sure if it's the same, but I was in Stone Vigil (low-level duty roulette) and the first boss never appeared for me. I took damage, but it was invisble for me. Being the healer it just sucked to have no clue where it was because although I followed the others around I couldn't be sure I was at the right place and suddenlt my HP just went down like a stone dropped off a cliff because I couldn't do much and was hit by *something*.

Not sure what would had happened in the rest of the dungeon because they eventually kicked me. I guess no one wants a blind healer.