Clicking mouse wheel when hovering link in documentation not opening new tab

When clicking the mouse wheel while hovering a hyperlink, normal behavior is to open the hyperlink in a new tab. However, when I'm e.g. in the documentation of QWidget::palette http://doc.qt.io/qt-5/qwidget.html#palette-prop and using the mouse wheel on the QWidget::autoFillBackground link, a new tab is opened AND my current tab changes to the link address. Additionally, this kills my browser history, which makes it impossible to navigate back "easily".

For some reasons, this does not always happen. E.g. also in the QWidget::palette documentation, when I'm using the mouse wheel on the QWidget or Qt::WA_WindowPropagation links, only the new tab is properly opened.