Just noticed this in an ARAM, and went back in by myself to see if I could reproduce it. Turns out it is pretty easy to do. I noticed that the search bar in the shop now says to press [ctrl]+something to search. Now, I know that Enter used to do this, meaning you couldn't get to the chat box while shopping. So I hit enter, and sure enough the chat box came up. Woot. But after this, I couldn't cast anything at all, or move my health potions. But I could still move around the map. On further investigation, it looks like it gets stuck thinking I'm still typing in the chat when I'm not.
How to produce the bug:
- Open the shop
- Hit Enter (brings up chat box)
- Type to put something in the chat send line, but DO NOT send it
- Hit Escape without sending the typed text (closes the shop and appears to deselect the chat box)
You now will not be able to move items in your inventory or cast spells at all.
Fortunately, I figured out how to get control back. Hit Escape a second time. I think its looking for you to hit Escape once to close the shop and a second time to get out of the chat window.