Upgrade StorageZotero decided that 65 citations were no longer citations
For some reason Zotero decided that 65 citations were no longer citations (they no longer link). It might have happened when I accepted numerous tracked changes. The difference in the "believed" citations and the "delinked" ones appears random (some of both were made prior to accepting the tracked changes). I hope there us a solution.
Track changes can cause problems, but it's more likely that it was caused by something else someone did (e.g., saving the file in the wrong format, copying some text into another program). If Google Docs, it can happen if someone edited the doc without having the Zotero Connector installed or used drag-and-drop.
More details: https://www.zotero.org/support/kb/existing_citations_not_detected