The problem with the menu of goods and additional. weapons (Metal Gear Solid 5: The Phantom Pain)

Help if anyone comes across!
I play on PC. When choosing an inventory for the main and second weapons (buttons 1 and 2 by default), by moving the mouse, I can switch between the menu and the cyber-hand (for example, between the pistol and the cyber-hand while holding down button 2), when you press 3 or 4, the selection of the inventory with the mouse is not activated! In general, an ambush, I can only use a box and a grenade (what is on the button at the beginning of the mission by default).
I did not find a solution on the forums. Maybe someone has seen or met something like this?
Thanks!