Has anyone else noticed that Saw Gerrera looses his hair between the various clips shown in the trailer(s)?

(source)

So either RO takes place over a longer period of time than previously assumed, or Saw looses his hair at some point for some reason.
The top photo is from one of the new trailer trailers, but it’s hard to tell where he is. Most people see to assume that he’s first seen on Jedha, which is most likely where he is on the second photo, but maybe he shows up some time earlier.