B18 corpse moving itself and other oddities

[mooklepticon]

Raid of about 6. Most of them die in the traps. A couple survive and make their way through. After a few more, they decide to flee. Mule gets stuck attacking the door in an attempt to flee and gets downed. I try to strip her. It doesn't work. It gets to 90% and fails. This happens 5 times before I stop attempting to strip. Melee attack to death. She's dead.  Clicking on her says "dead". One of my soldiers attacks with a bow anyway. I'm very confused. Mule starts wiggling north. It's a corpse without any body parts. Look at the screen shot, they're all destroyed or removed.  It's still moving. The pig bites are increasing. Still. They're at 14,000 as of this typing. The game has slowed to a crawl.  I'm getting about 1 FPS and declining.

Image attachment too large, so https://i.imgur.com/irir4YK.jpg

[Canute]

Hi
could you read the sticky "how to report a bug" and be sure it is a vanila bug and not maybe report it into Mod bugs ?
But if you don't use mod, more info's would be nice like at the sticky are written.