Bug: Item Sets?

Probably the only real reason I stopped playing LoL is because every time I go back to play my items sets are gone/the game needs to be reinstalled. I consider that quite a bug.

It's very simple, items sets should not be a preference file on the local device, they should be kept on your servers where they belong. You know like everything else does ( like Smite which makes a fraction of the money you guys do, sooo.... yeah.... ). That way you can go to any computer with LoL and just play. Not take hours building item sets again, over and over and over and over.

I mean I thought I playing a game not doing chores.