Using MouseArea in Overlay.modeless causes clicks through popup body and closes lower-level popups

Steps to Reproduce:

1. open popup1, popup2 and popup3
2. click on an area in popup2 that does not overlap with popup1

Expected Result: Only popup3 should close. Both popup1 and popup2 should remain open.

Actual Result: popup1 and popup3 are closed

The issue only occurs when MouseArea is present in Overlay.modeless.
If Overlay.modeless does not contain a MouseArea, the popups behave as expected — clicks on the body of popup2 don't close popup1.