I am new to this forum but i'm finding it really interesting, so i thought i could contribute with my little share of knowledge, from my researches here a similar bug have already been reported in this forum section, but with a slight different mechanic.
I found out by accident that being Battle Ressed inside the Brain Room (the druid was walking in the brain room at the time of the cast and obviously my corpse wasnt inside it but nearby in the inside portals area) made me unable to get ported out at the end of Madness but also able to keep DPSing the brain after my group went out.
I read about something similar happening with being DI.
However being Bresed imo its more interesting since its like turning a negative situation in a potential positive while DI is just using a CD on a already alive char.
Also it might be worthing to add tht i was stuck inside the brain room for all the fightlenght (means several portals) my sanity buff simply stucked at my dead's value.
Beside th fact tht 1 people DPSing the brain wont make much of a difference it might turn out useful in a situation where, lets say, ur portal team zone in for the 3rd portal , someone dies straight for lack of healing and then after DPSing the brain and going out to avoid madness ur team miss the phase 3 by few k of brain hp (happened quite some times at least in my guild), tht way u probably wont have to wait a fourth (unlikely successful) portal spawning and the locked(s) in will drag u to phase 3.
I know its nothing extraordinary, its just my 2 cents and sorry for the wall of text
On a side note dieing while being MCed wont get u durabilty decrease, i'm pretty sure someone should ha mentioned it before, so if u r in the brain room/portal and a wipe gets called u know what to do ^^