Hey Acid,
Is anything in this topic helpful for you?
Silas
Hello! Not really. We did create a new realm and it seemed to help for a bit, but we’re getting the desync and save validation errors again. Tried switching up who connects first and such, but no luck.
Alright, in that case please submit some files for us, to help Moon investigate 
See: How to Properly Report Bugs! where to find those and how to submit them!
Silas
Thank you for your reply. I’ll look into this when I play tonight 