Same as in the previous bar, the 
sign was moved to between the staves and slightly shifted (this time to the right). The absence of the sign in FE (→EE) can be explained by an oversight; however, it cannot be excluded that Chopin removed the hairpin as a part of the proofreading of the part of the L.H. According to us, even if it were Chopin's proofreading, it did not concern the sign written in A, applying only to the part of the R.H.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Errors in FE, Inaccuracies in GE
notation: Articulation, Accents, Hairpins