I have the latest infinite flight version, IOS 10, IPad Pro (2016) my iPad is not rooted nor jail broken, i have third party apps but i have not connected them to infinite flight. I have restarted the app and my device but it is still saying I’m offline.
Have you done anything that has prompted you to get an XP reset such as flying out of region or using an innapropriate callsign? If not, delete the app and reinstall infinite flight, also try doing a reset of your modem or router. Good luck and tell us if it works!