Tab size is 8 even though I have set all indentation settings I could find to 4:

Text Editor->Behavior->

• Default indent size is 4,
• tab size is 4. 

C++>General>

• default indent size is 4,
• tab size is 4

C++>content>

• "public, protected and private within clas body" is true
• declarations relative to public.... is true

Yet indentation in a class-body is mase using a tab size and indentation of 8:

class RichtTextWriter
{{{}}
        
        public:
                RichtTextWriter(QTextDocument& document);
}

I think this is a recent problem.