Dataflow does not keep/save Gateway configuration and shows "specify how to connect"

Hi.

All my dataflows are asking for connection configuration every time that I use the Edit option. This is happening for few days ago.

The dataflow from the image bellow is working fine:

When I use the Edit option the "specify how to connect" message appears:

If I click on "Configure connection" button, there is no Gateway associated to this dataflow:

Then I go to Project Options to set the Gateway:

Now I can see and refresh the data:

If I use the Edit option it asks for the connection again, as the first time, with no gateway.

Why isn't it saving the gateway configuration and showing the "specify how to connect" message everytime?

Tks,

Gabriel