Renaming a symbol adds trash white space

Renaming a C++ symbol with "Rename Symbol Under Cursor" seems to sometimes add trash white space in the row before the renamed symbol. Obviously it should not touch any other rows.

My project in this example diff uses 4 spaces for indentation and for some reason Qt Creator has added extra 4 spaces as can be seen:

This happens almost always I rename symbols with the rename tool and is pretty annoying.