APP 10 MWO Sync Error : The Given Key not present in the dictionary

We are trying to attach a document/photo to an object in mobile work order.  In most instances we get the below error.

You can just click in the failed transaction, edit proceed and the sync will be ok. 

But this is annoying for the users.  Is there a workaround or is this a bug.   

We are using the latest MWO client for APP10 which is UPD23 and using windows app.  Backend server is still in update 13 though. 

Attached the bug report as well.