Hello, I have the same issue. any refresh rate above 60 Hz produces flicker on the bottom quarter of the screen. I have Nvidia 2060 using display port and resolution is 1920 x 1080 also tried HDMI with the same results but I am sure it is not a PC related issue because the flicker also affects the monitor's settings menu. The issue started showing up about 6 months after first use(end of 2022) and gradually keeps getting worse.

I've read in more than one place that it is a common hardware issue with this specific model. I couldn't afford sending the screen under warranty because they gave me a "minimum of 1 month to inspect the monitor" and I did not have a replacement screen nor do I own a laptop. I am not even in the country I bought the screen from now. I honestly feel scammed by Acer over this because an issue like this should've been an automatic recall and replacement. do you have suggestions as to what to do?