everything Mrbig said above for me also,
Channelling spells carry on hitting you in stealth. Worse things to fight for me are dredge. Even though i’m in stealth and have been for around 2 seconds – the spell that they haven’t even cast yet will still home onto me and hit me even though i am now behind the target still in stealth, it gets really really anoying, ha!
Worse thing for me though is the stealing stealth trait point. I’ve been using it all the way to lvl 70. If I don’t stealth against normal mobs its mostly fine just anoying as it breaks my rotation, but against veterans, champions, and pvp its usually make or break as i tend to use it for survival and a few more seconds for my heal to arrive back round, coupled with a nice backstab. (Note that the bug tends to be autoattacking after i cast steal so it breaks stealth straight away, not that i’m immune to stealth or any other condition).