In addition to the weird “line of sight” issues at the start of the dawnbreaker dungeon, if one of the casters along the side at the start (the ones fighting npcs) are agro’d, they will spend the entire dungeon casting spells repeatedly at players across the dungeon.
It’s happened to my hpal twice now, in the normal version. The bugged spellcaster always ends up targeting me being the healer, so I spend the entire dungeon basically taking 100-150k spell blasts every second or two.