Its the same as for the cinema. When you move the camera to fast, it does not work anymore.
Popims screens are much more tolerant than the ones existing before, but still don't allow everything.
The solution is to keep less frames, and to create by morphing some intermediate images when the movement is too important.
Popims Animator analyses for you the quantity of movement, and enables measuring this movement by small green, orange and red leds that light when the movement is too important.