[Gameplay] Riven dashes into the oposite direction using E

I've been playing as Riven lately and noticed that sometimes she dashes in a direction different from where I have my mouse. Sometimes just the oposite direction.

I don't know exactly how to reproduce it but it might happen if you have your mouse over the chat or the HUD so:

Pick Riven Max her E Move to some direction and place your mouse over the HUD or chat and press E Notice she doesn't dash in the right direction.