If you're holding tab when you select an item to imbue in street brawl the extended tab view (all items and abilities shown under hero portraits) gets stuck on your screen for the rest of the match
I discovered the same issue in a regular Deadlock match. It is simple to reproduce the bug, if you press the keybind (tab) for the extended UI at any point when the ability imbue screen is up, it will bug out the UI to remain permanently, even if you just tap it and release it before imbuing an item.
Disconnecting and reconnecting does not fix this issue
The issue persists across game states, if I finish a game with the ui bugged, it will remain bugged in sandbox or future games
Pressing the keybind (tab) again during another imbue screen does not un-bug the UI
The only way to fix it is by fully closing the game and restarting
Playing after the Silver update - also encountered this bug. Was in Street Brawl, and the tab menu showing everyone's items got stuck open and I couldn't close it.
Writing in to say that this glitch is still happening to me very often. Like others said you cannot get rid of it until you fully restart the game. It's especially annoying in street brawl where you cannot pause the game :/
It just happened to me a few minutes ago, match ID 55528320