Strange behaviour after after upgrade to 2.1.0.4

This now says "8000 changes. The original post said “8000 new files”. There’s a difference.

CLI displays stats like:

  Files added: 0
  Files deleted: 0
  Files changed: 1

GUI stats for the same run (visible because job database is shared) are:

If it’s not really a new files problem but a changed files one, forum topic below sounds similar, however I don’t think it was a GUI versus CLI thing. It was also Docker on NAS. What is this?