Comment 12 for bug 336866

I think https://bugs.edge.launchpad.net/launchpadlib/+bug/341950/comments/2 also explains this issue described here, but I'm not sure if both bugs are related and can be fixed the same way.
Maybe some insider of launchpad's code can mark them as duplicates and rise priority of this bug, for me it looks like a design issue which should be fixed in an early stage of launchpadlib and/or the API