Having a basic docx document with two tables and bookmarks generates an invalid word document when saving.

Steps to reproduce :

• Create word document with table and bookmarks
• Load document into RadFlowDocument
• Cloning document will generate an exception
• Saving document works but the saved document cannot be opened with Word. (invalid document)

I have included a simple project to demonstrate the issue.

Version 2022.2.613 does not have the above issues.