So late game multiplayer campaign, kept on getting Desyncs to the point of it being unplayable and we are around turn 78. Tried multiple different saves, got different outcomes but still ultimately Desyncs.

Also bug report, if you have a widow in your family tree do NOT have her marry one of her Generals or "Other Nobles" The general will disappear entirely from the summary tab in the nobles section and in the family tree section.
i know this happens cause it occurred in my single player Latin campaign.
and just recent in my multiplayer campaign