Female sims (Spellcaster and Vampire) showing strap when bathing.

[MJGhost]

So I just made for the first time a spellcaster and a vampire.

They are both female sims with no penis, their underwear are normal and when they are nude (for sex or nudism) everything is ok.

 

But, for some reason, both the spellcaster and the vampire (only when in her vampire form) shows a non-default strap. And what's more, the spellcaster also wears another mod at the same time (fox tail and ears).

 

I checked every costume and they are ok, same goes for their underwear and body options. I don't know what is causing the issue.