OnOverlappingWindow no longer gets called

For some reason the OnOverlappingWindow event no longer gets called if an unexpected window appears for our desktop WPF application, and instead it always stops running the test and gives the error message "The window is disabled. The action cannot be executed."  My settings are shown in the attached image.  This was working previously, and I'm wondering if a recent TestComplete update may have broken this.  Anyone have any ideas on how this may be fixed?