Comment 14 for bug 1782797

Yes, same steps.
Checked the proprieties, observations (always keeping mm in Pcbnew option):
1) After create the dimension annotation, in the 'E' dialog is marked as 'mm / millimeter' (correctly);
2) Closing and re-opening the file (even before try to move the annotation) the option is already marked as inches.

If help, this is the file part with this annotation:

  (dimension 16 (width 0.15) (layer F.SilkS)
    (gr_text "16,000 mm" (at 235 30.7) (layer F.SilkS)
      (effects (font (size 1 1) (thickness 0.15)))
    )
    (feature1 (pts (xy 243 35) (xy 243 31.413579)))
    (feature2 (pts (xy 227 35) (xy 227 31.413579)))
    (crossbar (pts (xy 227 32) (xy 243 32)))
    (arrow1a (pts (xy 243 32) (xy 241.873496 32.586421)))
    (arrow1b (pts (xy 243 32) (xy 241.873496 31.413579)))
    (arrow2a (pts (xy 227 32) (xy 228.126504 32.586421)))
    (arrow2b (pts (xy 227 32) (xy 228.126504 31.413579)))
  )