Bug: Can't enter main menu (PC)

Crimson_Lockhart

On 6.3.2 after minimizing DBD window to about 1/3 the screen (was watching a you-tube video) to level up a character Dwight 0-50 I was unable to go back to the main menu I tried entering the store and was unable to enter it also tried the Esc key and full screen which was no help.

Video: https://youtu.be/YNH-IeSAUJU