Abilities lag bug

I keep having a bug in the game where, when I d/c with a lagspike for 1 second, I lose the ability to use my spells and abilities. This is really ruining quite some of my games. Normally the 1 second d/c matters less.... but now I have to leave the game, relog and that might take a minute. That's a difference compared to one second. It just happened to me, where I wanted to ult a zed diving on my jinx with his ult, but I couldnt because of this. This never happened a few patches ago. Bugfix please.

kind regards,

A silver league player.