Pull on Xamarin OfflineSync with Azure mobile do not download correct data

Question

I'm using the offline sync feature in my Xamarin Forms application.

The app connects to an ASP.NET Core API hosted on our server.

Everything works fine: from a mobile device I can send data using IMobileServiceSyncContext.PushAsync(). The data are those entered in the program:

For my tests I load this data on another device, by invoking IMobileServiceSyncTable.PullAsync().

To be sure that there is no "pollution" with existing data, I delete the local database file before starting the application.

Here is the contents of the table right after PullAsync():

We see that the data in the "ConcentrationPointTypeID" and "HighTensionTypeID" columns do not match, how is this possible?

And above all, how to find the origin of the problem?

Thank you in advance for your help