Also had this issue. One game with 2 people and one game with 4, just constantly desyncs.
I've also noticed that the last 2 crashes happened after I reached a new milestone in the New World. We have all the DLCs except for Anarchist, Empire of the Skies and New World Rising.

It's frustrating having to reload the game every 10 minutes - in addition to that, I can't seem to be able to build anything on the New World, because it triggers a milestone.

Also had this issue. One game with 2 people and one game with 4, just constantly desyncs.
I've also noticed that the last 2 crashes happened after I reached a new milestone in the New World. We have all the DLCs except for Anarchist, Empire of the Skies and New World Rising.

It's frustrating having to reload the game every 10 minutes - in addition to that, I can't seem to be able to build anything on the New World, because it triggers a milestone.