Mouse not being captured in client window

Verification builds: 1.2.5 (530691)

Summary: Mouse is not being captured within the client window, meaning when the mouse escapes the bounds of the Minecraft client window, Windows registers left/right clicks and sometimes causes the game to be paused when windows opens context menus, different apps, etc. Very similar to MC-112068 but in Bedrock.

Impact: Mouse is not being captured properly.

Repro Steps:

1. Open a world (windowed).
2. Rotate fully with mouse, notice the mouse leaves the client.

Observed Results: The mouse leaves the game client.

Expected Results: Minecraft should not let the mouse leave the client window.

Screenshots/Videos attached: No

Notes: Also tried killing Razer background process as the fix for MC-112068 suggests, with no joy.