Coding problem (gesture sensor)
Driving servos and LEDs from a hardware PWM may help. They will maintain a steady state even if there are interrupts. They may be a little less responsive to changes if there are interrupts.

Are you doing too much when the sensor interrupts? Typically a sensor makes multiple measurements and may be filters the results. When it is ready it interrupts. In the interrupt it should do as little as possible. Typically sending a message via global to a polling function that is not running in an interrupt. For example it may set a flag and the poling function reads the result. Reading the result in the interrupt would be bad.