Imageset sizes not respected in BevelButton IDE

Xojo 2017r1.1 & macOS Sierra 10.12.5

I created 2 BevelButtons and used imagesets for both bevelbuttons.
The sizes of the images are 16x16 px, 32x32 px and 48x48 px (all 72 dpi).
In the IDE the wrong sized is shown.
On a non Retina display the 32x32 px and on a Retina display the 48x48 px image is shown.

When I run the program, the images are correct.

Is this a known bug or is a FB required?

Known issue.

Thank you.