Raccat Tyon is a very nice gaming mouse, however, I noticed that with it plugged in, the screen, or have to say the PC would never get into sleep. After a few experiments a simple solution has been found, which requires the installation of the Tyon driver. It is not a good designed software however I’ve to say it worth the installation as it gives you a lot extra configuration of the Tyon, and most of the settings would be memorised by the mouse and being carried over to other system, for example button assignments and macros, even without Tyon driver installed.
To solve Tyon stops windows sleeping, simple disable the x-celerator buttons on its left side in the Tyon driver, which is not a big issue for me as I am not using them at all. After apply the settings, your PC should get into sleep properly now.