I have Lightroom CC 2015/6, and can sign into Lightroom on my iPad and iPhone, but changes from the desktop app will not sync back to them. Beneath my name in the Library module, it tells me to sign in to Lightroom mobile, but when I click to sign in nothing happens. Quitting and restarting did nothing. I am running OSx Yosemite.
Nevermind, it is syncing with mobile now. I just quit the application and started it up again, and it corrected itself. Not sure what happened.