So having had this happen too me several times I have been burned with the Voriak Solkyn's Crematorial Guard fire dot while taking the transport up top in the final stage boss VMA. If you are unfamialar with who that is its the deadroth that spits fire at you and wrecks your day with his nonsense!
The dot stays with you till you die so when your up top you have soul churn and that dot going on and you are pretty much toast. Is this a possible glitch are should you be able to go up top and evade the flame spitting lizard scotch free?
Other things that are not working well in there is bashing the boss when he does that multi attack....sometimes it doesn't register the bash and you have to stand there bashing over and over to get it to proc...
Weapon swapping is a bit laggy in there as well but it's pretty standard and universal to that in the normal zones where you would have weapon swap delay/lag not working properly. However, this one we just come to terms with it since we been dealing with it since the start of eso.