The editing interface and the preview interface for Drag & Drop Image questions seems to be broken when I use the Adaptable theme in a Moodle 3.9 course. I can edit and preview the question OK when using the default Boost theme, but not with the Adaptable theme.
In WYSIWYG edit mode, the draggable images are tiny on the image area, although they can be selected and moved around.
In question preview mode, selecting one draggable image works, but won't place properly over the background image.
Attached is a sample XML file I created and edited in a course with the Boost theme set, but when I imported it into a course with the Adaptable theme, it exhibits the problems above.