In [A2] (→GE) Chopin most probably consciously abandoned the idea to put a slur here. It is indicated by the change (or specification) of the dynamic concept through the addition of a 
mark in b. 103 and through a more specific indication of the staccato articulation for the chord in that bar (dot also over the L.H. fifth). After all, Chopin could have also removed the slur in the proofreading of FE (→EE), although an oversight (or misunderstanding) of the mark by the engraver of FE1 seems to be more likely.
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations
issues: Errors in FE
notation: Slurs