Manual indentation of closing lambda bracket is sometimes overridden

I regularly use lambdas inside std-Algorithms. Since the lambda is a parameter of the std-call, I manually indent the opening and closing bracket accordingly:

std::transform(container.begin(), container.end(),
               std::back_inserter(target),
               [](const QString& string)
               {
                   return string.count();
               });

Often, the editor later changes the last line, without any action on my side, and without my consent:

std::transform(container.begin(), container.end(),
               std::back_inserter(target),
               [](const QString& string)
               {
                   return string.count();
});

The line is also marked "red" as unsaved. Since I wrote the whole block in one go and then saved it, this clearly indicates that the change was made at a later time by the editor.

I suspect that this happens when I do a refactoring action that creates a new method in the same class.

Note: I never used the tool to correct indentation (Ctrl-I)