In FE1 there is no slur in the L.H., which was corrected in FE2 (→FE3).
In GC (→GE) and EE the slur is dragged to the first quaver in the next bar. The copyist and the engraver of EE could have been misled by a non-deleted trace of the original version of the 
sign.
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations
issues: Errors in FE, Errors resulting from corrections, EE inaccuracies, Authentic corrections of FE, Inaccuracies in GC
notation: Slurs