The missing slur in FE (→EE1→EE2) is almost certainly a mistake by the engraver. In GE and EE3, the slur was added probably on the basis of a comparison with analogous motifs. (In the case of GE it could have been one of the places possibly corrected by Chopin while proofreading the basis for that edition, while in the case of EE3 a repetition of the slur after GE cannot be excluded.)
In GE2, due to retouches, see b. 195-196, the part of the slur falling on b. 197 was overlooked (the placement of the slur over the bottom voice crotchets was also changed, among other things).
The slur of EE3 was probably added as a result of a comparison with analogous motifs, or perhaps on the basis of GE.
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category imprint: Differences between sources; Editorial revisions
issues: Errors in FE, Errors resulting from corrections, Errors in GE
notation: Slurs