(GAMEPLAY) Buying more than one boots

I found a bug where you can buy more than one boots. I played a custom game on Kalista and found this out. I dont know if this is true for all champions but please fix this bug.

1.)Play a game 2.)get enough gold to buy boots. (I found out that you can only purchase another boot if you have a tier 2 boot already purchased.)

I tested it the second time and it was still there so I think this bug is very frequent.

And that's how I found the bug. It was really fun to test it out but I had to report it soon so yeah :)