That's the problem. Although if you had space between hearbeats or something you'd realised you'll be smacking him for however many times he over-spammed sleep.

To the antipaladin it's more like: You can't concentrate enough to cast sleep

So if you went all tripping you'd likely get the chance to perma-lag, esp with cheap shot.

To thief:

This is what happened:
AP is spamming sleep OR some sort of bad trigger I dont want to speculate.

You garrotte - two round lag for you
AP is spamming sleep, one pulse per sleep, gets the message that he is already fighting
AP Flees
AP comes back after 1 round
AP attempts another sleep

Totally normal