that's what that line on the minimap is, my son had it a yesterday as well, and his team icons are to the left as yours are.
I too have seen the issue. Reproduction:
Temp fix, Have in match BOTH frames on right.
Side Issue(s): When I set both frames to the left then resetting them both to the right, I had champions who don't have a 'resource' (Mundo and Katarina) with resource bars suddenly with the color of mana and Manaflow Band ready.
bump