Doing "sudo rm /usr/lib/x86_64-linux-gnu/qt5/plugins/platformthemes/libubuntuappmenu.so" and commenting out menu code in DecoratedWindow.qml fixes those freezes
Doing "sudo rm /usr/lib/ x86_64- linux-gnu/ qt5/plugins/ platformthemes/ libubuntuappmen u.so" and commenting out menu code in DecoratedWindow.qml fixes those freezes