This is happening for about every 1 in 5 Radscorpions and a fair amount of other enemies as well, only outdoors. They jitter around like maniacs, but can't seem to escape the terrain. It's often accompanied by horrible corrupted meshes that look like gobbledygook. Anyone else having this problem?

Yes, common issue I suppose
We have to wait for a patch

This has always been an issue with Fallout lol. Just quicksave often and if a really bad glitch happens or a vital npc glitches out just reload. (I quicksave like every 30-60 seconds just in case)