at the beginning of b. 87 is the only pedal marking in these bars in A. It is almost certainly an oversight by Chopin, who resumed writing markings after transitioning to a new line. FE (→GE,EE) added markings in b. 88, most probably at Chopin's request, while GE and EE also added a 
at the end of b. 87.
Compare the passage in the sources »
category imprint: Differences between sources
issues: EE revisions, GE revisions, Authentic corrections of FE, No pedal release mark, Inaccuracies in A
notation: Pedalling
