The final fragment of the slur in A is written with panache, so the slur goes to bar 51. However, the shape of the sign clearly advocates for ending the slur in bar 50. In this situation the version of GE must be considered as erroneous.
The slurs in FE and EE probably reflect the original Chopin's notation: the slur in EE is almost entirely compatible with the range of that part of slur in A, which is written with a thicker line (from the 2nd crotchet of bar 49). Therefore, it is possible that Chopin first wrote this part and then completed the initial fragment of the slur.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources; Corrections & alterations
issues: Overextending slur, Errors in GE
notation: Slurs