Chopin carefully marked the range of the stretto indication with dashes – at the beginning of b. 64, one can see another dash in A, crossed-out so that the last three accented octaves were not "squished together" anymore. By an unfortunate trick of chance, the dashes were overlooked both by Fontana in FC (→GE) and the engraver of FE (→EE).
Compare the passage in the sources »
category imprint: Differences between sources
issues: Errors in FE, Errors of FC
notation: Verbal indications