Inventory Key resets to Unassigned when change other keyboard shortcut.

Steps to Reproduce: 

1. go to Keyboard & Mouse Settings.
2. change the Key of any Keyboard shortcut.

Observed Result: 

1. Inventory key will turn to "Unassigned".

 

NOTE: 

Mouse & Keyboard in MCPE_1.16.230.50 are 100% functional.