I had the same issue yesterday after not having played for a few weeks. Just solved it today by installing RimPy and letting it sort my mod list. After that no more missing heads.

So give that a try if you haven't yet.

edit: nvm, seems the issue returned after restarting the game a few hours later, even though I haven't changed anything. Different items this time around though, including items from the base game, so the issue might not even be related to this mod.

edit 2: I think I nailed it down to the following mod: Awesome Inventory (Unofficial)
After removing that I'm seeing the heads again and the errors are gone. That mod was causing plenty of other issues as well, I'm going to give [KV] Change Dresser a try as a replacement.

Hey, thanks for your comment! I haven’t played in a while but I’ll give it a try later today. I’m not sure if I have that Inventory mod but I’ll dive I to it and update any findings.

Any new info on this? I have no errors and everything works fine mechanically but the heads missing visually persists.
It's more annoying than being a problem but if anyone knows which mod might cause it I'd be thankful

Still does it. Shame that there is no response.

I have the same issue with backpack's and ammo pouch's. It makes a pink square for the pawns body in both locations. Its really weird cause for pawns with a backpack AND a ammo pouch, they are two pink squares.

Im having this issue with the backpack 2022, idk what mod causes the issue with it

did anyone ever find a fix to this?

Hello, I can't speak English, please excuse Google Translate.
For those who are having the problem of heads disappearing when equipping a quiver, have you installed "Packs Are Not Belts"?
Or, do you have the option to change the equipped position of quivers and ammo packs checked in the settings?
I was in the same situation, but by removing the check from the settings I was able to equip the quiver and ammo pack without any problems.
Just for reference, if you don't mind.
thank you.

Just got this and I do have Packs are Not Belts, with both relevant options enabled. They were fine before it, so something that mod does seems to cause it