I just tested it here and it works fine on my drawings.
My guess is that you're updating one standard but the drawings are set to use another. But hat is just a guess, please post a file for others to test if you're interested in solving this.
>> just think that it is something that dosent work in Inventor and that most people dont bother trying to change this setting. So it has been not noticed as an error in the program.
to be blunt, that is a fool's assumption that will get you no where fast. Rest assured that Autodesk doesn't get away with much without someone (often many many people) catching it. You would not be the only one to notice such a feature not working.