Please tell us some basic information before asking for help:
Model Name: Rog Phone 3/Twinview Dock 3
Firmware Version: Latest
Rooted or not: No
Frequency of Occurrence: NA
APP Name & APP Version (If your issue relates to the app): NA
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
========================================
Also even if it is already known, Twinview's screen also suffers from banding/black crush.