QComboBox popup position changes after widget reparenting

// combo is added to child widget of a window
// replace child with a new child, move combo to the new child
// call deleteLater() for a child to not destroy the combo immediately
// combo will be reparented
child->deleteLater();
auto *newChild = new QWidget();
auto *newChildLayout = new QVBoxLayout(newChild);
newChildLayout->addWidget(combo);
widgetLayout->addWidget(newChild);