The pedal markings in these bars (as well as in the subsequent ones, until bar 42) were added to A almost certainly after [FC] had already been finished, which explains their absence in FE (→EE1), based on this copy. It is difficult to imagine that an entire page of markings could have been overlooked; the same applies to the possibility of the markings having been removed from [FC] or FE. In GE the A notation was reproduced with a minor inaccuracy – the first 
mark in bar 20 was placed right before the next 
mark, hence after the chord on the 2nd beat, and not before, as it can be seen in A. Moreover, a was added at the end of this bar, which we include in the main text, since the absence of this mark is probably Chopin's oversight (in A this bar is at the end of a line, which is conducive to oversights). The markings in EE2 were added on the basis of GE1.
See also bar 18.
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations
issues: EE revisions, Inaccuracies in GE, GE revisions, No pedal release mark
notation: Pedalling