Hide
 

If someone casts a spell on you and you hide before it finishes it will still complete cast even though target was lost. It should interrupt their spell instead. There is also a melee bug similar to this but I haven't tested it, only heard reports. Something along the lines of being able to turn on attack, they hide, and then you can still hit them if you know where they hid.

Have experienced this over and over...

Shit sucks at low level when you know hide is your only way out, and you finally get a success message after like 5+ tries, and then you're just standing there still getting beat on.