Illustrator ExtendScript dropdownlist buggy display

When using the Extendscript code below to display a dialog in Illustrator, the dropdownlist display is buggy the first time entering the window, either showing things in duplicate or making a larger size.

Troubleshooting:

• Widened the popup and dialog widths and heights and still had the issue
• Tried Illustrator 2024 and 2025 - both problematic
• The same code doesn't present any issues when run within Photoshop

Testing Environment:

• 2023 MacBookPro M3 Max
• macOS Sequoia 15.5
• Adobe Illustrator 2025 (29.5.1) and 2024

var dialog = new Window("dialog", "Choose");
//dialog.preferredSize.width = 300; 

var popup = dialog.add("dropdownlist", undefined, ["First Selection", "Second Selection", "Third Selection"]);
popup.selection = 0;
//popup.preferredSize.width = 200; 

dialog.add("button", undefined, "OK", { name: "ok" });
dialog.show();