Mac 10.15 tray context menu doesn't always show

[jshirt]

I'm running into an odd issue with Qt 5.15 (also 5.14) where, in certain multi-monitor setups, the tray context menu will not always render. Specifically, if I have one monitor/screen extended on top of another one, then the bottom screen's tray menu will not render (you cannot even click and hold down the menu, it just instantly deactivates). If, however, the monitors are to the left/right of each other, then both icons work perfectly.

A crude drawing of the monitor arrangement:

  +=======================+
  |  Secondary monitor    |
  +=======================+
  | primary monitor       |
  +=======================+

This even occurs in the demo app "systray". Is there a bug for this, or something I need to do in this certain situation?