Stealth Bug, Thief and Mesmer
To add I first noticed it in the tower. But due to mass players, mobs and confsion of battle. I thought I was just missing it.
If a mob begins casting a long cast spell at you before you stealth (ala longbow ranger #2, rapid fire), they will continue to cast and hit you with it. The trick is to stealth before they start to send something your way. (or evade it)
This is intentional and has been this way since launch, as far as I know.
It’s also why mesmers rarely bother to use Decoy in PVE situations.
For the toast!
No, it hasn’t been that way since launch, but it was changed a pretty long time (several months) ago.
It’s clearly a (design) bug, though, since it works differently for players. If I have an enemy targeted (either a player character or mob), start casting a spell, and my target stealths, I lose my lock and my spell fails.
This is yet another one of those weird things about GW2, along with:
a) Mobs can knock players off ledges, but players can’t knock mobs (an invisible wall spawns behind them to save them).
b) Mobs sometimes heal back to 100% in the middle of a fight, or decide to “leash” without any warning, run away for a few metres, heal back to 100%, and then rush back.
It seems that whoever designed the AI thinks the #1 priority should be to “protect the AI”, even if that means letting it cheat in very obvious ways, that add nothing to the gameplay and just annoy players.
I must not have made it clear. I know the mechanics of stealth.
I know they will hit you if you stealth when they’re in a channel or start of action.
I know mobs stop when you stealth in pursuit. I know this was added to keep them from resetting.
What I’m talking about is a random disregard for a player in stealth to pursue and attack in the first few seconds of player stealth.
I recall a while back(month or so ago) they changed the way mobs behaved to player stealthing. the mobs used to just stop everything and reset like no big deal. now mobs will proceed to continue the attack as if the player was still where he/she went invisible and would also use some predictive following techniques i believe if the player was moving when going invisible