Mac - Content Browser menus are dismissed when using them while toasts are running

REGRESSION: Yes, this does not occur in 4.17.2

If the user is using any of the Content Browser menus while there's an active toast, the menu will suddenly be dismissed. It appears to get dismissed if the user attempts to use a submenu (such as Filter > Animations).

I could not reproduce this issue on Windows.

1. Open QAGame in editor.
2. Click the Compile button in the toolbar.
3. While the toast is active, click the Filter button and hover your mouse over any of the filter options.

RESULT

The menu is dismissed suddenly