At random times, mag abilities will cost stam. The only thing that fixes it is dying, which is not an option in a no death run.
Character will suddenly start moving super fast and be unable to cast skills or perform actions. Death fixes it, and sometimes you can just wait it out, but not an option in some instances.
Player lists in guild and friends menus will reset to the top any time changes occur in the roster such as someone logging in or out of the game.
This last one is just a pain in the butt, but the first two are making certain content impossible.
PC/Xbox NA Mindmender|Swashbuckler Supreme|Planes Breaker|Dawnbringer|Godslayer|Immortal Redeemer|Gryphon Heart|Tick-tock Tormentor|Dro-m'Athra Destroyer|Stormproof|Grand Overlord|Grand Mastercrafter|Master Grappler|Tamriel Hero