Sion Ult Bug
When ulting with Sion through the jungle i started going in the indicated direction, and then i suddenly reversed and went back the way I came. Ult went on cooldown as per usual. Everything else was normal. This is the first time I have seen this bug. No other champions were around me.
SION
That happens if you accidently land your cursor on minimap when ulting.
It's very frustrating when you press ult while your cursor is on the map and suddenly charge in wrong direction.