The missing slur must be an oversight. The slur was added in EE, yet it encompasses only the semiquaver triplet (its range is not entirely clear – the slur reaches slightly further than a similar slur in the previous bar). In the main text, we add a slur encompassing the entire figure like in the majority of analogous figures. The same slur was added also in GE3.
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category imprint: Graphic ambiguousness; Differences between sources; Editorial revisions
issues: EE revisions, GE revisions
notation: Slurs