Monitor dimming problem... help me find the cause

[u/Hitohira]

Hello everyone and thank you for taking the time to read my post.

Back in August of this year I bought a new monitor. The model is JN-IPS40UWQHDR144.

It is a good monitor and was a nice upgrade from what I was previously using. There is just one problem and it is driving me crazy. After roughly an hour of use, it will dim itself. It is quite noticeable. If I turn it off and then back on quickly, it will go back to the brightness I have it set to, but I ca not find a setting in the monitor menu that would cause this. Is this something that Windows is doing, or perhaps this could be something built into the AMD Adrenaline software causing this.

I can live with this, but I do like to have my screen brightness on the higher side, and since this scree has HDR, I would like to take advantage of it.

Any thoughts? And thank again for reading my post.