I have been working in the problem document and thought everything was a-ok so I did not have the Debug Logging turned on. I just scrolled up to an earlier portion of the Google Doc and discovered that approximately 11 links, all from the same source and all in a row, have all unlinked.

@adomasven Thank you for sticking with me on this and for the great recommendation! I went back through my version history to try to pinpoint when the citations unlinked.

Based on version history, the action that seems to have unlinked the citations was adding a citation from a new source much later in the document. The citation that I added occurs several pages after the citations that became unlinked, but it appears that when I added this citation perhaps Zotero "refreshed" the rest of the document? The citation directly prior to the group of citations that became unlinked updated to be a shortened version of the citation, and then boom: the next 12 or so citations (all from the same source) unlinked.

Does this make sense? Thank you again.

@adomasven Thank you! I went back through my versions. I found and restored a version directly prior to the citations unlinking and recreated the unlinking. I cut and pasted a section of text to earlier in my document, and the citations unlinked. I was working within the same Google document.

I also tried to make sure I had my debugging log turned on: The Debug ID is D1485268959. I am hoping that will report what happened. Thank you!

@devrajoy: Could we also get a Debug ID from the Zotero Connector from you for this happening? Make sure you've reverted to a version of the document where the citations are OK after refreshing, and then enable logging and perform the operation that causes them to become unlinked, and then Refresh to trigger the warning. (Note, as we say above, that it's the operation before the Refresh that's causing this, not the Refresh itself. The Refresh simply detects the problem and shows the warning.)

Well that didn't take long...D290080853
was doing some rewrites that did NOT re-order refs. Added a citation that also did not reorder refs, then 4 refs became unlinked.

connector ext report 490768589

I changed prefs to "not available offline" refreshed page, refreshed zotero, refs are still unlinked. Then went to docs extension in chrome and turned it off, refreshed page and zotero again, still unlinked.

i was trying to relink and was sent to trouble shooting and found this "If Track Changes is enabled when you insert or modify a Zotero citation, it may mark many or all of the Zotero citations in your document as changed or cause field codes to be displayed. On rare occasions, Track Changes may cause Zotero to think a citation is corrupted. If you had Track Changes enabled previously, try accepting all changes to see if that resolves the issue." google docs automatically tracks changes, and I want it to.

and just for good measure, as i'm trying to relink and having issues...
Report ID: 1286120372

debug won't let me send report, but took a screenshot of the javascrtipt.

This first started for me when I shared a doc with my advisor and they made "suggestions" when I figured out it was a problem that she didn't have the extension or shared library, I unshared, accepted all suggestions and was able to get back on track. I copied that doc into a new doc and the problems continue. FWIW I will need to reshare for "suggestions" later.

@mstyang Note that if you went to the point directly before Zotero turned your citations red to indicate that they are unlinked - that's the wrong point. As dstillman noted above (and so have I, before), that is only the point where Zotero had "noticed" that the citations have become unlinked. Some earlier edit to those citations would have caused the unlinking, you would have to go to that earlier point and perform whatever the operation was. So in the version history you need to look to some point older from where Zotero turned the citations red, where those same citations (and/or surrounding text) had been edited (e.g. copy-pasted).

@devrajoy: Note that that's not a Debug ID, and "Google Docs Offline" is still installed. (We can't tell if it's enabled from the Report ID alone.) See what I said above:

You still have the Google Docs Offline extension installed there. If you've disabled it, you should restart Chrome and provide another Debug ID for any error you're getting with that disabled.

You keep providing Report IDs from the Zotero Connector and Debug IDs from Zotero. Those aren't useful. Again, we need a Debug ID from the Zotero Connector for this problem occurring with "Google Docs Offline" disabled.

All I can do here is repeat what I said above, which still applies:

Could we also get a Debug ID from the Zotero Connector from you for this happening? Make sure you've reverted to a version of the document where the citations are OK after refreshing, and then enable logging and perform the operation that causes them to become unlinked, and then Refresh to trigger the warning. (Note, as we say above, that it's the operation before the Refresh that's causing this, not the Refresh itself. The Refresh simply detects the problem and shows the warning.)

Everything has been fine, including moving blocks of text that did not reorder refs. I just tried adding a ref that required re-ordering.

I assume you use a numeric style and when you say "reordering" you expect the citation numbers to change based on the position in the text. To give you a better picture of what is happening:
1. When you copy a piece of text in the document and paste it somewhere else, the Zotero Connector detects if any citations were pasted too and attempts to manually relink/store them in the doc (which is why sometimes when you paste a piece of text you should see a "Please wait... Zotero is updating your document" overlay). At this point the citations would be "in the document", but not updated for the location in which they are.
2. When you perform any Zotero action (inserting a citation, bibliography, refreshing the document) and Zotero notices that some citations have been pasted, at which point it updates them too. If, however, something went wrong at step 1, then at this point those citations that failed to paste properly would be marked as unlinked.

So to debug this you need to use the version history to go back to the point right before any possible big modification to the unlinked citations and see whether they still unlink if you perform a Zotero action. There could be some other reason that we have not accounted for, than a failing copy-paste as described in 1 which causes the citations to unlink but it would still have to do with editing of the part of the text where the unlinking citations are.

@paulbosma: For this we'd want a Debug ID from the Zotero Connector, not from Zotero. As noted above, make sure you've reverted to a version where the citations are not unlinked, confirmed by refreshing and not getting the warning or seeing the citations in red.

Can you reproduce the issue consistently by copying the same part of the text into a new Google Docs document?

Can you make a copy of this document, trim it to only the part that fails when copied, test copying to ensure it is still broken and share it with support@zotero.org?