Keymander Keeps Disconnecting my Controller
There are three things for you to try. Move the KeyMander to a different USB port on the PS4, so if it is in the front, move it to the back. Next, connect the Power port to a different USB port on the PS4 so both cables go to the PS4 for easy wiring. Usually this is an indication of a bad USB port on the console, because it passes data but the current (power) is too low.
Third thing is to fully charge your controller before using it with KeyMander. Once it is charged the KeyMander will keep it charged just fine, but starting with low internal batteries on an older controller can cause too much current draw.