I’ve split your reply into its own thread to ensure it receives proper attention. Per the last thread, did you try disabling HDR on the problem monitor?
Beyond this, we’ll need a full breakdown of your system info to better serve you:
Roon Core Machine
Include your operating system and machine info (Model, CPU, RAM)
Networking Gear & Setup Details
Your network gear (model of routers/switches) and if on WiFi/Ethernet
Connected Audio Devices
Specify what devices you’re using and their connection types, like USB/HDMI/Chromecast, etc.)
Number of Tracks in Library
Tell us how large your music library is, eg. “30,000 tracks”
Description of Issue
Tell us about the problem you’re having in as much detail as possible. Screenshots are always appreciated!
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Also, please take note of the date and time the next time you experience this issue, and share it here. Thanks