Deadlock starting QApplication

Starting a simple application example hangs when creating the QApplication. It
only happens on a certain machine.

This occurs in version Qt5.14.2, but not in Qt15.5.2.

If we change QApplication to QCoreApplication it works.

It is hard for us to migrate our product to Qt5.15.2 version.

Can you tell us if the problem is known and a possible workaround?

I attach code and callstack.