Merely subclassing QHeaderView causes it to lose built-in functionality

class CustomHeaderView : public QHeaderView {
	Q_OBJECT

public:
	CustomHeaderView(Qt::Orientation orientation, QWidget *parent = nullptr) : QHeaderView(orientation, parent) {}
}

// ...

QTableView view;
view->setHorizontalHeader(new CustomHeaderView(Qt::Horizontal), &view);

This causes the following functionality to disappear:

• Hover effects
• Bold header text on selected column
• Clicking the header selects the whole column

Since no new behaviour was implemented and no methods were overridden, I would expect it to behave exactly like a vanilla QHeaderView.

EDIT: Actually not a bug. QTableView calls `setSectionsClickable(true)` and `setHighlightSections(true)` on the QHeaderViews upon initialization. Custom header views must do the same to retain the default behaviour.