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reproducible with 061112_2 Shift-Down/Up navigates through incomplete set of links if message to self exists see attachment, create the same diagram, select first lifeline and try shift-Down, forward link from synchronous mesaeg never selected/ try shift-up: backward link is out of order
Created attachment 36013 [details] diagram
This was a problem with recursive edges. Basically, when we retrieved all edges, recursive edges was in the list twice.
verified in build 061129_6.