convert on save works here - new document - turn on `View->Show white space` so tabs and spaces are visible - set `Document->indent type` to tab - insert some tabby indented contents (and the tabs show as arrows) - set `Edit->Preferences->Files->Replace tabs with space` - save the file
and the tabs turn to spaces, the arrows become 4 little dots.
the `Document->Indent type` must be spaces to insert spaces when indenting (either by tab key at line start or automagically) and if you now set that and type return in the file above you get indented with spaces, which show as 4 little dots.
If following these steps does not work then there may be a bug, but thats how it is supposed to work and it works here.
If some other set of steps feels like it does not work, report the exact steps similar to the above so it can be replicated. If it can't be replicated its not a bug :grin: