I have withings Sleep Mat. After waiting at least 4 hours, my data didn't sync. I had to log out and log back in. This is frustrating. Why is this happening? I understand it takes at least 2hrbfor the data to be sent to the phone. But I have waited longer than that. I've tried clearing app cache, uninstalling and reinstalling the app, nothing works. I have to log out and back in every day.