Preview repeatedly losing edits

cskemp wrote:

I am using Preview Version 11.0 (1033.4). I am editing a 25 page PDF. The editing tools I am using are the text tool, and the shape tool. I am copying a page, and then applying text and shapes. I am doing this repeatedly. Preview keeps losing my edits. At first I thought I found a workaround by making an edit, saving, closing and then opening again. But no, it keeps happening. I left the document in the background for a while and I returned to it and ALL edits applied to ALL pages were lost. Currently in this session I am up to about 2 hours of lost time. THIS SHOULD NOT BE POSSIBLE. I have looked through the previous versions, but they too have lost all their edits. Maddening.

I would try a true PDF editor, there are many, and compare your results

here are a few examples:

Adobe Acrobate DC

https://get.adobe.com/reader/

PDFpen

https://pdfpen.com/pdfpen/

pdfExpert

https://pdfexpert.com/

Master PDF Editor

https://code-industry.net/masterpdfeditor/?-about&ver=5832

for your issue—you can file a bug report /submit your Apple Feedback here: Product Feedback - Apple