[Gameplay] Unable to put ranks in ablilities as Kha'zix

I was playing a game recently as Kha'zix jg in blind pick mode against a Rengar jungle, and at level 16 after I had already evolved my claws wings and camouflage I completed the quest to kill Rengar and become the ultimate predator. However, after I evolved my spikes the icons that appear over Kha's abilities when choosing which to evolve never went away, and so even when I hit level 17 and 18 I wasn't able to put anymore ranks into my leap.

I'm not really too sure about how to reproduce this bug, and that was the first time I've ever seen it since that was the first time I've ever been Kha'zix against a Rengar, but after I killed Rengar and evolved my spikes to become the ultimate predator I was stuck with not being able to put ranks in leap.