My iPad Air 4 does not charge when I connect it with the original Apple USB-C to USB-C cable. Is that normal? I was under the impression that the MacBook Pro 14 inch has enough power to charge an iPad. It is connected correctly (I can perform backups etc) and it even shows the charging indicator (if I remember correctly) but the % just does not increase. I am not using the iPad at that time, therefore I do not think it could be using more power than it receives.