Hi Didey,
Thank you for reporting this bug to us.
This could happen if you are using Strict Mode during syncing.
You can find Strict Mode setting on the Source's Site Settings Page under "Advanced Settings".
Once there set Strict Mode to Off for every Destination Site and save settings.
Then on the source site try updating your post and see what happens with the post on the destination site.
Please give it a try and let us know how it went.