post its and text disappear when using spaces

Everytime our team uses Zoom whiteboard the post its disappear when you hit the space bar, back space or shift. It happens to users as well as the creators. People with Zoom accounts and without. Everyone. It’s happened now in 3 different classes, rendering the white board useless. We can’t write text or post its they all disappear when creating any space between words on the post its. I’m using the most recent update of Zoom. Others are probably various but it was happening to everyone. Please help,