Please provide the following when creating the Ticket:

Game Version number: Arma Reforger stable version 1.4.0.45
Modded?: No

Issue Description:

After opening the inventory and hovering the mouse cursor over the slots, the effect of the exit button disappearing occurs (if the mouse cursor is moved outside the inventory slots). Exiting the inventory menu is impossible if the cursor is outside the slots. This did not happen before and everything worked fine (you could close the inventory at any time by pressing the "Esc" button).