If I put a List in a utility panel that becomesKeyOnlyWhenNeeded, it becomes unresponsive once the panel loses key status.
Build and run the attached sample application Steps are in the app window, but for completeness…
• Open the popover with List
• Test that tap select/deselcts rows
• Detach the popover. This results in an NSPanel that is the application key window for the moment
• Test that tap works
• Click on the main window
• Test that tap no longer works
• Note that the chevron still works
• Note that selection in the other popover doesn't exhibit this bug