BuddyPress.org

looks like a child theme to me, is it yours? in other words are you responsible for the customisations, in which case you know that nothing vital has been altered or left out.

What portion / section of the uploaded image is saved given that you say you haven’t got the crop window whay area does get saved.

This has to almost certainly be a JS issue, with JS disabled the whole mechanism handles pretty badly, and really needs flagging as something to look at one day.