Reset track number on next disc appears broken

The Reset track number on next disc option in the Auto-numbering Wizard appears not to have any effect.

Repro steps:

  1. Load tracks with different disc numbers, where the tracks are sorted in order
    • 10 tracks with Discnumber: 1
    • 10 tracks with Discnumber: 2
    • 10 tracks with Discnumber: 3
    • 10 tracks with Discnumber: 4
  2. Start the Auto-numbering Wizard
  3. Check Tracknumber
  4. Check Reset track counter on next disc
  5. Click OK
    • Expected: Track numbers reset at 1 each time the disc number changes
    • Actual: Track numbers never reset; all track numbers are sequential from first to last

What do you have at Next disc on change of field?

The disc numbers are already set on the files, so I don't have that checked.

My thought was that resetting the track counter on 'next disc' implied it would use the DISCNUMBER field by default.

Do I need to explicitly set Next disc on change of: DISCNUMBER? I'm not setting the disc number, so seems like that should be the default. I thought it was an option to be used if I was setting the disc number by checking the Discnumber box.

Yes, from the docs:

Next disc on change of field

If enabled, the disc counter is incremented if the value of the selected field changes.