I don't know how I can explain this by words so I am sharing a video.https://drive.google.com/file/d/1QLaJM1_HUE6RhNEiU2BBS4_r6Ss_MAgq/view?usp=sharing
(You might only be able to see the problem if you are on full screen and also mute the audio if you don't want to hear wired click noises. Don't know why the screen recorder enabled my mic in-between)
Had trouble uploading a video here. I don't know if it is because the video is in the wrong file format or what. Okay I will get to the point. These things only appear when I am in xfce and on full-screen. It doesn't happen all the time. Only on certain times like when I press a button. Help, it is getting worse day by day . I use Zorin 16 Core xfce. Thank you in advance.