I'll be submitting a bug report in game as well but I wanted to also bring it to the attention of the customer support forums in the hopes that it'll expedite the fix or at the very least bring it to the attention of someone so that it can be fixed down the road.

Anyway as of right now there appears to be a major bug with Devouring Swarm. I try to keep from overusing that particular skill and mainly save it for bosses/elite mobs or use it as my emergency "HOLY CRAP I'M GOING TO DIE!" button. Right now while questing in Coldharbour I've had two separate incidents where I've used the skill as my HP was getting low but the damage I took exceeded my ability to heal through it. In both cases I've technically died but a glitch has given me health right as my HP hits zero. This results in me being able to run around as if I'm alive and even in some cases being able to talk to NPC's. However various other actions such as attempting to mount, sprint, use potions, ect results in a "You can't do that while dead" message. In addition I have no option to revive myself via Soul Summons or a soul gem.

Another side effect of this is that I can walk right up to hostile mobs and get zero reaction from them. Attempting to attack or use skills near them also give the "can't do that" message. I've already tried /stuck once on the initial incident but all it did was port me to the nearest wayshrine with the glitch/bug still in effect. The only fix I've been able to find to get out of this issue is entering Cyrodiil. Upon entering the zone it clear the bug out and I can return to where I was via a shrine but all in all it's rather time consuming :-/

Anyway thanks for taking the time to read this. I'm enjoying ESO greatly and for the most part my own experiences have been rather bug free. When they do pop up however they tend to be doozies XD