I'm not exactly sure as to this is a bug or not: when archiving a project using Kdenlive's "project" > "archive" function, the .kdenlive file references its producers using a duplicate $CURRENTPATH/$CURRENTPATH/... This looks odd to me; but maybe it's supposed to be that dup pattern?
Okay, that's an artefact because both the <mlt> root attribute is set to "$CURRENTPATH" as well as the resource properties.
As archived projects are not meant to be played back directly in melt (why not?) I'm closing my report to reduce clutter. "Thank your for my cooperation." ;)