Dropbox not syncing

I’m using Devonthink Pro office 2.11.1 syncing to Dropbox between multiple computers. One computer is the main database where items are added and the other computers are just for viewing. The sync will work fine for a few months. Then it will stop working. Devonthink will say the sync worked but the other computers will not have any of the new information I put into Devonthink. I will have to clean the database and sync to get the sync to work again. Has anyone else had this problem?

Does a verification of the sync store report any issues?

The latest version of DEVONthink 2 is 2.11.3.

No issues are reported.