strange sign

[Umar Ismail]

does anyone know why it suddenly appears like this?

[Alain Verleyen]

Did you fall asleep on your keyboard?

[Dominik Egert]

Umar Ismail:
does anyone know why it suddenly appears like this?

Are you using a Microsoft wireless keyboard?

I had the same issue, changed Keyboard, problem disappeared.

[[Deleted]]

Umar Ismail:
does anyone know why it suddenly appears like this?

its because you may have pressed shortcut of hindi character उ