ComboBox in Dialog does not work on WebAssembly with asyncify

A QComboBox inside a QDialog does not work properly on WebAssembly platform for Qt 6.8.1. Qt 6.7.0 works OK.

The ComboBox's drop down appears when clicked, but items aren't selectable. Note that ComboBoxes work OK inside a MainWindow, just not in a Dialog.

This is with Multithreaded version of WebAssembly with -sASYNCIFY using emsdk 3.1.56.

Example project attached just creates a dialog box with a combobox in it. (This works fine on Windows Desktop 6.8.1 and WebAssembly 6.7.0).