ugh i wish people understood how these things work.
Rihanna's A&R team basically places a bulletin out saying they are looking for material - and almost every mainstream producer submits SOMETHING - always. If they don't do it themselves specifically for Rihanna, their management sends stuff over they just have around. If a producer does something specifically for Rihanna, and she doesn't show interest in it - they shop it around to the next artist until someone takes it or becomes apparent the song is a dud.
Rihanna is not "working" with Redone any more so than she did with Rated R or Loud. I guarntee you he submitted stuff for both those projects.