I have had something similar on my Nubia Pad 3D. On the odd occasion that l have completely drained the tablet and l go to recharge it with the 33W brick and supplied usb charging cord, it will not charge. I then have to use a much, much lower watt usb charging cable and brick which l then am able to start the charge … l get it to about 4 or 5% and then l change to the 33w brick and supplied charging cable and it then seems completely fine! This always happens and is the process l follow if the tablet is drained to zero … which l don’t do often but sometimes it happens!