I changed the ball speed setting to the highest level but the speed it’s the same, no running faster.i think it’s a bug on application ( Ios App ) 
app version:1.1.0 Software version: 0.74
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It might also be related to the motion it’s doing. There’s a physical limit on how fast it can go while doing a circle. Try some pattern that has a lot of straight lines and play with speed to see whether it has any effect or not.