After enabling Full Keyboard Mode, moving the view and opening a new interface will still allow the view to move.
Steps to Reproduce:
Navigate to Settings > Keyboard & Mouse
Enable Full Keyboard Mode
Enter a world
Move the camera using the keyboard
Open a block with an interface
Observed Results:
The player’s view continues to move after the interface is opened.
Expected Results:
Opening an interface should immediately stop all view movement.
Please edit your report to change the Affected Version to the version shown on the Minecraft title screen