Who knows, it could be anything. 🤷‍♂️

I saw this one as well. I think it is a blank Unicode character. Probably this one https://www.compart.com/en/unicode/U+2800

Lol, this is pretty funny. It reminds me of a video made by vsauce https://www.youtube.com/watch?v=K93zcgFsynk&t=10s

Maybe is an unprintable character, or just an ñ or ç weird thing.