Ultimate skill shots going in wrong direction over champion icon
I believe this has already been reported last year for Ezreal's q. However the bug still exists with ezreal's ult, lux's ult that I've tested. Also think it exists for talyiah's ult (from stream clips). From testing, when the mouse cursor is over the champion icon, the ult goes whatever way the character is facing when stopped and the opposite way the character is facing when walking in particular direction.
See:- Ezreal https://youtu.be/zeNq_emAhws