The version of A and GE is undoubtedly correct. The single-voice notation of FE (→EE3) is probably a result of a misunderstanding of the autograph's notation. The division into two voices without changing the rhythmic values is certainly a result of the revision of EE4 (similarly in bar 63).
Compare the passage in the sources »
category imprint: Differences between sources
issues: EE revisions, Errors in FE, GE revisions
notation: Rhythm