Trall taking damage for no reason

Game mode: [Singleplayer]
Problem: | Bug | Misc]
Region: [base] edge of desert and jungle

[Free text]

After returning to my base when away doing whatever, at other base, in dungeon, or just exploring, when I return to main base with lots of thrall guard’s some are holding there side like there hurt and when I check them, there health it is very low. Mostly the tier 4 and also some others, Tarman is one that is always hurt. I am in a safe zone with no mobs around for them to fight. All of them have an armor set. I tried to move them around to see if that fixes it but it does not help.

Steps on how to reproduce issue:
1.leave base and return

I’ve actually seen this happen to thralls when looking at them, they go from standing normally to the injured stance, I check their HP and its very low when it was previously full. No enemies or anything around that should have damaged them. I’ve also seen it while managing thrall inventory, their health bar suddenly starts dropping.

It normally happens after server restart. And they only regenerate when you are actually there or someone else. So the zone gets loaded so to speak.