Weird 1.9 Screen Glitch

When I loaded up minecraft one day I noticed some weird stuff under my pointer. I have a video showing what happened with me. Is there anyone to fix this. This only happens when I use minecraft 19 and above. The link to my youtube video is https://www.youtube.com/watch?v=AgXUCqahIcc

Please leave a comment or a link that will help.

• Central Gamer