Automatic placement: issues with tick box and color of values

Win 10 / 3.0-dev, 77b832b

1. Click on a chord symbol in the attached file;
2. Untick "Automatic placement" in the "Element" section of the Inspector.

Expected result: The colour of the values changes to black.
Actual result: No change.

3. Undo the changes, select a chord symbol, drag and release it.

Expected result: "Automatic placement" becomes unticked?
Actual result: "Automatic placement" remains ticked.

4. Undo the changes, select a chord symbol, then use the left-click of the mouse to change an offset.

Expected result: The "Automatic placement" box should become unticked and the chord symbol should move?
Actual result: The tick remains and the chord symbol does not move.