On Mac with multiple monitors, the secondary monitor (scale=1) is positioned above the primary retina screen (scale=2). When showing a popup in the case of 100 elements, the down arrow at the bottom cannot be seen.
In the attached screenshot, one can see the popup clipped at the secondary monitor bottom edge, the gray bar is the top of the primary screen.

Monkey tester can be used to reproduce the issue.
Monkey tester: https://github.com/andy-goryachev-oracle/Test/blob/main/src/goryachev/monkey/MonkeyTesterApp.java