DesktopListBox placed on a DesktopGroupBox causes highlight display issues

Bugs and Feature Requests
1

DesktopListBox placed on a DesktopGroupBox causes highlight display issues

Feedback Case Number: #81620

Using a DesktopListBox control on a DesktopGroupBox somehow makes the highlighting on selected rows display incorrectly. The issue does not occur when the ListBox is not within a GroupBox. No special drawing code is being used on the row, only the built in behaviour. The issue seems to be new to 2026r2.

2

I’ve just tried Xojo 2026r1.2 and it shows the same issue. I’m wondering if this is caused by macOS 26.5.2, but don’t have a 26.5.1 to try it with. Please can someone try the attached project on a 26.5.1 and see if it is reproduce. Many thanks

3

no problem on macos sequoia 15.7.7

4

Beatrix confirmed that this happens on previous versions of Tahoe. So it could be related to Xojo’s alterations for that OS.