Witnessed several times that in mid-fight that healty bars of legendary enemies (and only legendary) are refilling mid-fight.

And no they are not using aid items (I reckon mirelurks don't have stimpaks in their pockets), they just refill like instantly.

I've occasionly catched the ".... is mutated" message. Can it be that?

And if it is, all types of enemies can do that?

Because if this is the case, then it's just bigtime b****hit!

Thats what they do thats why i alwsys go for the limbs especially the legs they wont get fixed when they mutate.

Something like this happens in Borderlands, If an enemy becomes badass or gains a badass rank (mutation) they have all their health back. I do believe this was intended to happen

Yes, the health bar refilling seems to be related to legendary enemies mutating. Whether you view that as BS or not, is up to you.

which borderlands is that? The goliaths are the only guys that come to mind that "mutate" oh and the varhkids

Since legendary enemies tend to be quite weak idc.

If the mirelurk queen woulda gotten her health back I would have destroyed my monitor.