Qt Creator replace tabs with spaces disregarding all the respective settings.

I have tabs set in Text Editor/Behavior (Tabs Only, Auto detect disabled) and in Qt Quick/Formatter. Tried all three options there, and even though formatters behave as expected and format with tabs (context menu action "Reformat Document"), the "Auto-Indent selection" action replaces all of them with spaces, an so does saving the file.

Blacklisting *.qml files in the Text Editor/Behaviour/Cleanups upon saving helps to a certain extent, but typing in .qml still inserts spaces left and right.