In the development version, I’ve added notes to the pcbnew console window for the “selected” failed objects. I’ve also added annotation in the Dialog to the items that write to Eco2. I didn’t see any wayward writes to Eco1 or Eco2, only those that occur with Outline Thickness non-zero or Draw All Outlines set. I’ve changed the development version so that only one layer (Eco2) is modified if either of those is true.