Fresco controlling nTune color temperature fixtures exhibits behavior whereby lights flicker or change color temperature.
This can be more apparent when doing a master raise or lower or executing a scene with a longer fade time.
Earlier versions of the nIO used communication rate and polling to determine bus activity being up or down. The master raise or lower operation from Fresco sends a flood of global channel updates. In particular with nPoller version Z-007 or earlier on the Fresco.
Update to latest version (Z-008+) of the nPoller or Fresco co-processor and nLight device firmware.