keyboard and mouse not working

keyboard and mouse does not work for Minecraft bedrock. i can play other games with my keyboard and mouse but not Minecraft. my cursor does not show up in the game menu and in the inventory section. i can use my keyboard for everything else but not my mouse, i can look around with it but not anything else. once i turn my controller off i cannot look around with my mouse or use my keyboard.... been like this since 3 updates ago.