The nLight occupancy timeout may be due to the configuration not being written correctly from Fresco Studio or Firmware. Attempt to set the timeout of an occupancy sensor to another value on the Fresco Touchscreen and then set it back to the expected value. See if the correct value is being applied to the nLight occupancy sensor.
If the firmware version is 106 or below:
Set the timeout value to 20 minutes or less if the firmware can not be upgraded.
If the firmware version is 107 or above:
Using SensorView verify the settings being written from Fresco.