If you level up Ganr's W while transforming, you cannot cast it (grayed out).
See video below (around 10 sec in): https://www.youtube.com/watch?v=vD3f_14acPc
I tested it in a custom game after, and confirmed it only happens with his W.
RiotRiot Exgeniar3 votesThank you for the report! The video was extremely useful! Sending it off to the right team.
Laminar Flow1 votesGood to hear! Hope to see it in the patch notes! :D
Gavran1 votesEver, or just in that one instance of transformation?
Pretty big bug regardless, good catch.
Laminar Flow1 votesJust during the instance of transformation. I could cast it normally after the transformation completed.