Enhanced Scatter chart not working at all

I'm trying the Enhanced Scatter chart following these instructions:

https://powerbi.microsoft.com/en-us/documentation/powerbi-service-tutorial-enhancedscatter/

But I'm already having problems in the second step.

I added an Scatter Chart, managed to select Details, Legend, X Axis, Y Axis and Size and I could get the correct visualization.

But when I change to the Enhanced Scatter Chart all I get is an empty visual even before adding shape, image or backdrop.

I'm using last version of Power Bi Desktop (32 bits) and I also tried doing it with Power Bi Service.  

Does Anybody has had the same o similar problem with that custom visual?

It would be great to have an .pbix example file, but the documentation doesn´t provide it.