The notation of Atut may be misleading – there is a delicate trace of ink caused by the quill's transfer between the staccato dots, which the engraver of FE considered a slur. The revision in GE3 was most probably performed on the basis of analogy with the following bars.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources
issues: Errors in FE, GE revisions, Inaccuracies in A
notation: Articulation, Accents, Hairpins