Episerver.CMS.UI >= 11.20.1 no more focus on existing image on 'select image' popup

Episerver.CMS.UI < 11.20.1

When I have a block/page with an image:

[UIHint(UIHint.Image)]
public virtual ContentReference MobileMenuBackgroundImage { get; set; }

and you click in CMS on an existing image, 
then the 'select image' popup appears.
the existing image is focused, with a yellow background.

Episerver.CMS.UI >= 11.20.1

The existing image is no longer focused. causing complaints by our content managers.
(we have 1500 images, so it will take a while to find it now in the list in the popup.)

I reverted to 11.19.0 and it's ok again