It is difficult to consider the missing slur in GE an oversight, since the slur in FE consists of two sections in two lines of the text. Therefore, the engraver of GE would have had to overlook two marks (as well as the wedges at the beginning of bar 94). It means that the slur was almost certainly added by Chopin in the last phase of proofreading of FE. A shorter slur in EE is probably a result of the engraver's inaccuracy.
Compare the passage in the sources »
category imprint: Differences between sources
issues: EE inaccuracies, Authentic corrections of FE
notation: Slurs