Cursor disappears while using "annotate"

Hello, I am using zoom on a Mac book to teach. Often when I share my screen and use the 'annotate' fonction, my cursor disappear and it's impossible to find my mouse on the screen. I already tried to download the latest upgrade, tried to restart the app and the computer but It keeps happening very randomly. My trackpad doesn't seem to be the problem as I use it normally everywhere else. If someone had this problem and found the answer.. thank you.