Lenses work Not really

[Splivke79]

Hi, first of all I want to say thank you for the opportunity to continue using Snap Camera.
I have worked my way through the tutorials and so far everything is working.
Except for some lenses where I have a blurry square around my head or something in the middle of my face in a similar style.
I could swear this has been covered in a similar way before but I can't find the post. It's been driving me crazy the last few days as I've been doubting whether I have one on my head 😂
So I think you/you know what I mean and that there is an answer.
No matter how it turns out.
Greetings