Had an issue for while with slew speed, whereby upon initiating a goto and slewing to another target, the slew speed becomes faster but speed position slider stays in same position. Only way to get back to normal speed is to move slider down/up then back. Let me know if need any more info.
Iphone 6 IOS10
SKYFI3 (occured with skyfi1 too)
AZEQ6 and Synscan