mouse lock can not to be use(minecraft windows10 edition)

mouse lock can not to be use(minecraft windows10 edition) Mouse pointer cannot be included in the screenshot.

Steps to Reproduce:
1.Opened Minecraft windows10 edition
2.Opened a world
3.Move mouse down.The right mouse button will click on the windwos taskbar

Observed Results:The right mouse button will click on the windwos taskbar

Expected Results:The right mouse button will click on the windwos taskbar