'Team Management' menu not working in-game

There is a critical issue where the 'Team Management' menu becomes inaccessible during a match if the player Alt-Tabs out of the game at any point after a match has been found.

Steps to Reproduce:

1. Start/Find a match.

2. Alt+Tab (switch windows) even once after the match has started.

3. Return to the game and try to open the 'Team Management' menu.