The change of pedal on the 3rd beat of the bar is an arbitrary addition of Fontana, who proofread FE1 in the absence of Chopin. He intervened due to the single 
mark at the beginning of the bar left in A (which, in turn, must have resulted from corrections and crossings-out). Upon seeing a change of the bass note, Fontana complemented the markings in a standard, safe manner; however, he did not check the authentic pedalling in analogous b. 61. Interestingly, in FC he added only a 
mark at the end of the bar.
Compare the passage in the sources»
category imprint: Interpretations within context; Differences between sources
issues: Errors resulting from corrections, FE revisions, No pedal release mark, Fontana's revisions, Inaccuracies in A
notation: Pedalling