Cycleops magnus

Speed is all over the place.  I can hold steady power and cadence and the speed is all over the place.  It goes way up and way down and usually stays at 2 or 3 mph.  I have read many posts.  I am using Ant connection and calling the trainer FARIS SE.  Please help to get my speed in a normal range.  I have calibrated successfully multiple times.

Speed within Zwift is determined by watts, weight entered, in-game bike used, in-game drafting and virtual elevation changes. Your speed within Zwift will change with the elevation changes even if you keep the same watts.