Are there any differences in the way the content was created? For example, was one through the Jive UI whereas the content that has missing elements created through the API or a different method?
I have seen various results based on the method in which a user or item was created. To help support continue to look into specific examples you are seeing in your community, I would recommend creating a case in your private support group. In the case, if you could provide an example of a piece of content for the impacted items as well as an example on a non-impacted item. This will allow for support to further review your specific site and proceed accordingly.
If you are not a member of your support group, your Community Manager should be able to open the case for you or invite you to your private support group so that you can create a case.
Hope this helps.
thank you for your reply! I have confirmed that the user I used to issue REST calls does not have enough permissions to retrieve securityGroups information. Actually the user cannot retrieve also appliedEntitlements of spaces as well.
But it is still not confirmed yet how the documents were created, which would make them miss the HTML URL.