I found one of those dragons, after painfully trying to kill him, he didnt fall to the ground when he had 0 health, just glitched about in the middle of the air and then would fly up so i couldnt see him anymore
This thing happened to me too:
Immediately after I fast travelled to Windhelm stables to see a Dragon slide down the slope opposite town and into the river where he drowned. Dragons are... kind of busted right now.
It's crashed twice on me today, no crashes on other servers I've played yet. Both times it's happened when I've been having a good game (by my standards, anyway) and it's pretty annoying for the whole round to disappear.