Some annotations not visible in Adobe Acrobat
Hi,
I have a PDF which which I have annotated using the Files application on my iPad Pro (using the Apple Pencil). I can view most of the annotations fine in Acrobat, but there are some which I cannot see. I can, however, see them in Google Chrome, Microsoft Edge, and Foxit Reader. After I open the affected PDF in Foxit Reader and do a Save As, I can see the annotations in Acrobat.
An example:
Page 6 of the PDF in Acrobat:

Page 6 of the same PDF in Chrome:

This does not affect all annotations :
Page 9 of the PDF in Acrobat:

Looking at the Page Content Information, I can see that there are no annotations listed on page 6 (the first example), while page 9 shows a square annotation:

Given that the annotations are working fine in some cases but not others, and the data is obviously there. I assume it has something to do with the way the annotations have been saved. This is supported by the fact that Foxit can save the exact same PDF, and Acrobat can suddenly view the annotations.
Is there an easy way for me to fix this in Adobe? Or a way for me to find why these annotations aren't working?
