In MacOS, ShowModalUtility opens a window but will not immediately draw that window

Unity: MacOS

Backport

2021.3.X

2020.3.X

Verified with 2021.3.16f1.git.768746 Personal Revision: 2021.3/staging 0bbaea860775 Built: Mon, 05 Dec 2022 18:41:34 GMT

When opening a new window with ShowModalUtility, the window opens but doesn't draw until an event occurs. This occurs in MacOS only.