Writing on Whiteboard Disappears on iPad but not on Mac

A new problem has come up just in the last couple of days that I have had no problems with previously. While using Zoom to tutor, I use both my MacBook and iPad. The iPad is for writing on the Zoom whiteboard. For some reason, when I write on the whiteboard on my iPad, I can see what I am writing until I lift my Apple Pencil at which point what I wrote disappears on my iPad but is visible on my MacBook and for everyone else in the meeting (including my student). As you can imagine, it is quite difficult to write on the whiteboard with my iPad when I cannot see what I have already written. Has anyone experienced this? How can I fix this?

I have tried deleting and reinstalling the Zoom app on my iPad, following and unfollowing the creator of the whiteboard, and creating the whiteboard on both my MacBook and on my iPad. None of these have helped.