No Champ In Shop Bug

This is a crazy bug. I sold my last champ on the board (tried to hyperroll) but the next thing happened to me is my entire UI is frozen at the state of my screenshot. After couple of rounds it doesn't resolve itself, meaning i have no champ to be able to buy (it literally say 'sell for 0g' for several rounds). Lvl Up and Reroll button are also missing as you can see (thought D & F hotkey still seems to work just fine).

I'm not too sure how did I actually trigger this bug but I guess no one would be happy if you can't buy any champ...