Dataflow - Entities from a specific server do not show up in Desktop

[tharding]

I have created 2 dataflows in Power BI service. Each has entities sourced from 2 different SQL Servers. In each case the entities from 1 of the servers does not show up under the dataflow in Power BI Desktop (the entities from the other server are ok).

The entities refresh OK in the service, and there are no errors that I can see in the refresh history. 

The server connection is set up in the gateway.

Any suggestions about where to look would be appreciated. I figure there has to be a setting somewhere I am missing, but I set up all of the entities in the exact same way.

Thanks