[GAMEPLAY] CONQUEROR GAME BREAKING BUG

So today i decided to play a ranked game of league and as soon as i hopped in we had an afk, i tried to ping him then my ping cursor got stuck so i could spam it without pressing the ping key, after it went away i brushed it off like it was no biggy but then, i tried to tumble on vayne and i couldn't use any abilities. I tried spamming all keys at once, and it worked, but it did them all at the same time. Then i tried to heal and flash and it didn't work but sometimes it did. This is stupid and i lost the game cause of it.

DONT USE CONQUEROR I WENT INTO THE PRACTICE TOOL AND STILL COULD NOT USE ABILITIES BUT THEN I CHANGED TO LETHAL TEMPO AND EVERYTHING WAS FINE

I WAS PLAYING VAYNE