Editing Fretboard Diagrams

There is a slightly annoying feature of the fretboard diagrams in Version 3. The diagram indicates an open string even when you place a note on string. This did not happen in version 2. In Version 2 the open string indicator disappeared when you placed a note on a string. In the current version (using the inspector) you have to doube click on the open string indicator to remove it, which slows the process of editing. I think this is a genuine mistake in what is otherwise a really excellent feature that works well in all other respects.