I've found a little hint about indentation, so I want to share with. Maybe it's the issue that already explained somewhere else. If so, just ignore my post.
There is a difference between hit tab key simply vs. hit tab key with selected line(s). When I take the former way the indentation is applied only the one line, so next line doesn't hold indentation. However, taking the latter way, the indentation was kept on if changing line. This is the same difference between using tab key vs. Ctrl+M key on the version of Windows Client.