Bug Ranked 3v3 and 4v4 fixed positions

Ive played more than 150 ranked games 3v3 or 4v4 and every single time I’ve been flank.
Is there a problem/bug with my account?
Ive tried changing username to see if for some reason I get placed in alphabetical order. Still being flank.

Plz help. I want to play as pocket sometimes too.