Qt Creator opens an empty text file in the tmp folder when clicking a faulty item in its help viewer

In Qt Creator's help viewer, when I select a documentation item that is faulty, the Qt Creator opens a default text editor with an empty text file @ /tmp/QtCreator-######/qtchelp_######. 

The faulty item examples:

• an item that corresponds to a topic which does not belong to the current module
• an item that refers to a topic that does not exist, like this one: https://code.qt.io/cgit/qt/qtdeclarative.git/tree/src/qml/doc/qtqml.qdocconf?h=v6.7.2#n23

Steps to reproduce:

1. In Qt Creator, open the help viewer.
2. Expand the Qt QML documentation module, select Examples. 

The default text editor with an empty temp file opens.