ArabianVirtual_CEO wrote on Jan 14^th, 2017 at 3:43am:

Check to make sure you're not tapping your rudder pedals (if you have them) or manipulating the rudder. The CS T7's autopilot is very sensitive; even a slight rudder input will disconnect the AP. Let me know if that works.

It's interesting that you say this, as my joystick, a Logitech Extreme 3D Pro, has developed a problem with the twist grip. It always pulls to the left, which I have to override when taking of (my 777 ended up taking off from the grass beside the runway just now), yet it doesn't cause the AP to be disconnected. The AP is constantly fighting the left rudder input caused by the joystick, so I disable it once the AP is controlling the aircraft.