Layouts are ignored by ECK

Hi, I've created a new ECK type on a clean Drupal 8.1.1 website. The ECK has been called "rows" and I've assigned a layout from the default provided. I've also created a new entity reference field to "rows" on the default page content type.

The ECK content is not rendered using the assigned DS. Drupal simply prints the fields ignoring the DS layout.

I've tried to create a specific visualization mode and I've assigned it on the entity reference field visualization settings but with no difference.

Finally I've tried to print the ECK using views, even in this case the DS layout is ignored.

I've tried to use layouts referencing standard nodes and everything works as expected. The bug looks isolated to ECK entities.

Thanks for your feedback.