The slur, started in A in bar 63, the last on the page, was not finished on a new page. According to us, one should assume that Chopin's intention was to write in the part of the L.H. a slur of the same range as in the complete slur of the R.H.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: Inaccurate slurs in A, GE revisions, Errors of A
notation: Slurs