I've never been booted, however I have encountered a few bugs...
In the Sewers, the first locked door you come to will never open. The quest NPC's will never discover the guy they are looking for in the rabble of refugees, and so the dungeon will never progress. The only thing that fixes this (to my knowledge) is to reset the dungeon, everyone drops the quest, and nobody picks it up. The door will not be closed.
In Darkshade Caverns, the kwama boss does not drop any loot, not even trash.
When you come to the Netch boss, you have to kill it your first try. If you wipe the boss bugs out and you cannot engage him again until you reset the dungeon.
Also, I have been told that the final boss in Darkshade has a similar bug. The room you are in will seal itself, so you cannot release because you cannot get back in to the room, and the boss never drops combat with you, so you can't res where you are. Basically you have to one shot that dungeon or it bugs.
I have not encountered any bugs in Elden Hollow. Just an incredibly stupid tank that cant interrupt, cant dodge, cant block, cant taunt, and cant read.
Yes. I am talking about you Blizzyy.
Never group with that guy.