Dead Faction Characters Appear?

[Big Brown Bear]

So I'm playing a campaign with the Moors. I just wiped out Portugal 3 turns ago maybe? All of their characters that were still alive disappeared as expected.

Now, two 0 finance merchants and one 0 piety priest suddenly spawn in my region... And they are Portuguese?

Is this normal?

[Navajo Joe]

Sadly, yes and a bug, no fix for it