Xbox controller (PC) button issue

[PVB_UK]

Am using a wired (USB) Xbox controller to my PC. Game Pass version of the game, fully updated.

Finding it difficult using the Back button to open the main in-game menu. (menu with map, inventory, etc.)

If I press it quickly, nothing happens.

If I press/hold it for a fraction (e.g. 1/4) of a second, the menu sometimes opens. Sometimes not.

If I press/hold it for more than about half a second, it swaps view between first and third person views. 

Not sure if it’s a bug and it should open to the menu on a brief press or not?