The omission of the slurs/ties between the chords is an oversight by the engraver of GE (→FE,EE,IE). It cannot be ruled out that the engraver did not insert the slurs due to doubts regarding their significance and position with respect to the arpeggio wavy line.
Regardless of the possible dilemmas of the engraver of GE, the meaning of the bottom-most slur/tie concerning c is unclear – if c were to be tied, the arpeggio of the chord in bar 283 would concern only the top 3 notes, contrary to the notation. This resembles the issue discussed in bars 4-6.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Errors in GE
notation: Slurs