Game Mechanics: NPC's continuing to attack after successful FD

[talian21]

Hi, I searched the forums and found nothing quite like this, so I thought I'd post it:

I was running thru FV on my monk, hunting a quest mob when I was jumped by a drolvarg, and a froglok shaman. I dutifully waited for the shaman nuke to land, and FD'd. I received no FD fail message, and they just stood there, as expected. I reached over, took a drag of my cigarette, put it back in the ashtray, and started waiting for them to walk away. Except that they didn't walk away; after all that time, the shaman began casting again, broke FD, and to keep this story short they killed me.

1.) I checked my /log. There was no "fallen to the ground" message.

2.) I was running around looking for something, so my attack key was never on, much less forgotten to have been turned off.

What happened here? It seems to me that this is a bug, either straight up, or something funny that happens with lag, I don't know. But something was definitely definitely wrong. Any idea? And a GM rez wouldn't hurt either. Thank you.