The absence of the 
returning a
is undoubtedly an oversight of Chopin in [A] (→GC,FE1→FE2→FE3→FE4). In the remaining editions the sign was completed, it was also added in FES.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Errors in FE, Omissions to cancel alteration, GE revisions, Errors of A, FE revisions, Errors of GC
notation: Pitch