I have the same issue, with my Lenovo 7" but does works fine with the 10". I too would like some feedback on this issue. I will be sending the flight data to DJI later today. So lets see. I cant see exactly what tab you are using? Android? or Apple?
For all interested my 7 in is:
Chipset Mediatek MT8382
CPU Quad-core 1.3 GHz Cortex-A7
So tonight i flew it again with a different cable. Same thing happened, still have control of the phantom 3 pro but still getting disconnected. Its definitely not the cable.
It also can't be wifi as im using an ipad mini 2 without any 3g/4g/wifi at the moment (it is a cellular but i have no working sim card in there).
So any ideas?!