Linux monitor frequency 50 hz

During login (when you select a user and ask for a password), the screen operates at a frequency of 50hz. How to fix it?
Fedora 34 system, similar issue was on ubuntu 21.04 and 20.04. I’m not sure about 50hz, but the frequency is clearly lower than the maximum monitor (144hz), because the slowdown is felt. After entering the password, the image disappears for a couple of seconds (apparently the new display settings are applied) and the image becomes normal (144 hz).