Maybe it was a shapeshifter 😅 but yeah, nasty bug indeed.
Have you been to the goblin camp yet? I’m wondering if you haven’t and you go there without SH it might jump to you in the cutscene that happens first time you go.
That would be an interesting experiment!
In the meantime, I would keep the file and send a feedback using the form on the website :
https://larian.com/support/baldur-s-gate-3#modal