Problem with ASUS ROG Strix xg248q

When you load a saved profile, which included ELMB, twice in a row, the color change. They become brighter and more contrast. Light strip, for example, become invisible on a light background. Also in the profile, set the brightness and contrast 100, saturation 45, FPS mode. Same problem if using this profile with the ELMB, enable and then disable all ASCR. ASUS told me to carry it to a service center for diagnostics. But it seems to me that this may not be an isolated case but the norm in this monitor.
Who has this monitor, you can do a quick test for the presence of the same problems, and accomplish your goal here.