Recent Glitch with the new buy menu

I recently had this issue re-occur multiple times in rank games today; I wanted to switch my slot 1 (Mana Potion) with my slot 2 (health Potion), The game would make the sound of the switch, but wouldn't complete the action.

If there is a fix please let me know, if it's a glitch, I'm glad I could bring attention to the issue.

Thanks, Weedamins