The fact that the slur was not continued after the transition to a new line in FE1 is almost certainly an oversight, corrected – probably by Chopin – in FE2 (→EEW). The mistake was also noticed and corrected in GE.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources
issues: Errors in FE, GE revisions, Authentic corrections of FE, Uncertain slur continuation
notation: Slurs