All Abilities Disabled Mid Game

So I was playing heimer and during mid-game (level 10) all my abilities suddenly grayed out. I couldn't cast any abilities. When I tried it would just say you can't cast this ability. I ended up roaming and basic attacking. I had enough coins to buy an item after a couple levels so decided to go back to base and buy an item - why not. By the way, I couldn't "b" back, that didn't work either. I had to walk all the way back to base. It wasn't until than all my abilities became active again. I literally went 3 levels without any abilities. Has anyone else experienced this? This is so strange. Thank goodness I carried the early game and Yasuo was able to carry mid. This was a ranked game so you can imagine my panic.
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