SUMMARY I am working on a large C project and whenever I configure the editor indentation to use tabs and spaces then click either apply or OK, the setting does not take effect. If I re-open the setting page it shows that it reverted to tabs only. STEPS TO REPRODUCE 1. Open a C project 2. Configure to use the C kernel coding style 3. In the settings editor indentation tab, select the "tabs and spaces" radio button 4. Click Apply and/or OK. 5. Return to the editor 6. Notice it has not taken effect. 7. Re-open the indentation tab and see that it has reverted to tabs only OBSERVED RESULT EXPECTED RESULT It should select tabs and spaces so if I hit a carriage return it should choose the appropriate indentation position using tabs and spaces (i.e. line up additional parameters properly). The tabs and spaces should also be present in the project configuration rather than global. Note that my project source formatter settings are configured to "Use default". SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: 5.61.0 Qt Version: 5.13.0 ADDITIONAL INFORMATION