I usually turn-off the cellular data for Facebook app unless really needed and there is no wifi around. But somehow Facebook app overrides it.
Try this under Settings -> Cellular data turn-off Facebook, close the settings app and open it again, and its on again for Facebook. I don't think it's a bug, because this happens only with Facebook app.
Is there a way to set this to off without deleting the app?
Try this under Settings -> Cellular data turn-off Facebook, close the settings app and open it again, and its on again for Facebook. I don't think it's a bug, because this happens only with Facebook app.
Is there a way to set this to off without deleting the app?