closing QComboBox popup with Escape key also closes QDialog on macOS

Escape key press is somehow propagated to parent dialog when combo box popup is closed with it. As a result, the dialog gets closed.

Consider this code.

#include <QApplication>
#include <QComboBox>
#include <QDialog>
#include <QVBoxLayout>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QDialog w;
    auto vbox = new QVBoxLayout();
    w.setLayout(vbox);
    auto combo = new QComboBox();
    vbox->addWidget(combo);
    combo->addItems({"A", "B", "C"});
    w.open();
    return a.exec();
}

Steps to reproduce:
1) run the code
2) click the combo box to open the popup
3) press Escape to close the popup

Actual behavior:

• Dialog is closed.

Expected behavior:

• Only popup is closed but not dialog.

This bug seems to exist only on macOS, everything seems to work well on Windows and Linux.