20 minute ban canceled by invasion invite

I don't want to recreate the scenario for more evidence and i only have the evidence that i saw it with my own eyes but um maybe someone can check into this at riot? so i had the low priority queue set, with the 5 games and all. but this guy invited me into a premade for invasion and i said yes and the ban thing vanished. after we won the game, it was normal my client was just normal. no wait time, no low queue. wat :v