The 
sign in A is placed clearly after the 1st crotchet in the L.H., which, as it seems, was accurately reproduced in FE (→GE1no2,EEW1→EEW2). Chopin probably wanted to preserve the sound of the e
bass note, yet he also wanted to avoid the mixture of the melodic semitones of the triplet in the R.H., which can be achieved by pressing the pedal only on the last note of the triplet. In EEC and GE2no2, the notation was considered to be inaccurate, in turn, in GE1op (→GE2op→GE3op) the indications were generally omitted, probably due to an oversight.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Errors in GE, GE revisions, EE inaccuracies
notation: Pedalling