So every time I look up or down the curser shows my task bar or the top window bar and I keep on clicking on them  (not intentionally) while I'm playing Minecraft in FULL SCREEN, why do they even show up?

The reason why I'm PLAYING ON FULL SCREEN is so that doesn't happen.

This only happens in Minecraft bedrock edition I've never had this problem with anything else full screen... before you say it may be on my end.