Hi everyone, i had recently purchased a flysky fs-i6 Tx, and everything seems to work fine except for the yaw axis. i find this strange because since throttle is on the same stick, wouldnt it effect the throttle too? when looking in the display screen to show all of the stick movements, it shows that Ch4 works sometimes, but sometimes it glitches up and doesnt pick up movements. is it just a faulty product? any advice would be greatly appreciated, thank you!