Hide Player function during boss fights

Bug Name:

Hide Player function during boss fights​

Bug Description:

With the addition of the custom boss fight player hide feature I have been killed multiple times during a boss fight by players I cant see. I can't kill anyone, let alone damage anyone, but apparently I get killed and damaged all the time (even during iframes and after running away from the boss, once it died with iframes/SA movement skills) i just drop life constantly until I die.

Seems like to me either other players can see me in a place where I'm not really at or people just damage the boss and it somehow ends up dealing damage to me aswell.

Maybe it has something to do with certain players having this feature enabled and others don't. Either way it gets annoying, atleast I should be able to see other players who can see me or don't take any damage at all, during the actual boss fight.​

How to reproduce/proof:

Declare war on another guild, have players of that guild do a world/field boss and stand next to the boss.​

 

I am not an expert on this topic but I do have a couple of suggestions of why this might be happening.
Number one: the most obvious answer is that someone is using the PvP enable WHILE at the fieldboss event, however when you die you would immediately know who killed you by screenshot'ing after death, if there is no player name saying that player killed you then it is most likely number two.
Number two: the lagspikes/desync-like behavior of the french server is simply affecting how the fieldboss is damaging players, you see the boss do something and then you dodge or use a skill which makes you invincible BUT the damage is applied anyway due to connection problems.