How it is currently in the game:
WASD are the only movement keys that allow a player to move while the inventory screen is open. Even complex inventory operations, like loading rounds into a magazine, are possible this way. Using the arrow keys (or any other keys for that matter) does not allow movement.

How it should be:
A: Remove movement altogether while a player performs inventory operations and close the inventory as soon as he starts moving
B: Allow movement for any combination of movement keys, keep the inventory open when player moves

Variant A seems more realistic, often people loot bodies while circle strafing, trying to avoid fire.

Variant B seems more fair since looting is a basic gameplay element and opening and closing the inventory only to search the floor 1 m further seems like a nuisance.

Afaik this has been carried over from Arma 2, Arma 3 shows the exact same behavior. Share your thoughts on this.