Fresco controlling nTune color temperature fixtures exhibits behavior whereby lights flicker or change color temperature or go to max brightness / intensity.
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 the latest nIO-CCT device firmware available on the Stable channel.
If problem persists, update to latest version of the nPoller / Fresco co-processor (Z-008+).