iPad Annotation Troubles (continued)

For my virtual classes, I set up a Zoom meeting with my computer and my iPad both as co-hosts.  In the past, I would share the PDF on my computer and be able to annotate on my iPad in such a way that all meeting attendees could see it.  This summer, when I tried that, annotations would randomly appear and vanish, and now, THEY DON’T SHOW AT ALL.  When I annotate the PDF on my iPad, it will show up on my iPad but it doesn’t show to the other computers in the meeting at all.  This is the annotation tool within Zoom and not some sort of outside annotation tool.

This used to work and was very convenient for me, and now it doesn’t work.

Does anyone have any possible fixes to this issue?  Is Zoom working on a fix to this issue?

Thanks!