How is atts_since used? Documentation talks about using rev-number, but that does not seem to be valid anymore, as atts_since parameter seems to require full revision id:s, like “integer-digest”.
Another issue with atts_since we have is that it seems to require exact revision-id of rev to which the attachment was added. For example rev-history:
1-a, 2-b, 3-c, 4-d
…If attachment was added at revpos 3, 3-c and then we request atts_since[“4-d”], it still includes attachment 3-c in reply. We have to use exactly atts_since[“3-c”] to avoid having 3-c data in reply.