The separate R.H. slurs in these bars result most likely from a misunderstanding of the notation in A by the engraver of FE. Bar 52 starts a new line in A, and the beginning of slur clearly indicates a continuation. However, the slur in bar 51 extends only slightly beyond the bar line what might have mislead the engraver.
EE has no slur whatsoever (it only starts in bar 54), what is certainly a mistake, like in previous bars.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources
issues: Inaccuracies in FE, Errors in EE, Inaccurate slurs in A, Uncertain slur continuation
notation: Slurs