The starting point of the slur in A cannot be explained either musically or pianistically, hence we can assume an inaccuracy of notation here. The reason for an earlier start of the slur in GE (→FE,EE) is probably a routine approach of the engraver of GE1, although one cannot completely rule out Chopin's possible correction. Anyways, the composer did not question such a slur while proofreading FE1, for example, in the previous bar.
Compare the passage in the sources »
category imprint: Differences between sources
issues: GE revisions, Authentic corrections of GE
notation: Slurs