Mac mini M1: flickering vertical lines on different shades of gray

Hello everyone,

I bought a Mac mini M1 a few weeks ago and I have had problems with the colors it displays on the monitors. Initially, I connected it to a LG 24MP59G-P monitor and it showed some faint vertical lines in shades of gray, despite being light or very dark shades, it is way too notorious in the windows' frame when enabling dark mode; I thought it was the monitor, so I decided to connect it to a Samsung LF24T350FHLXZX, but got the same results. Finally, I connected it to an ASUS PA248QV, but with no positive results. Now I am convinced that it is a problem with the Mac mini, since trying all the possible solutions: changing the cable, restarting the devices, changing the monitor settings, etc., the shades of gray still have those vertical blurry lines. Has anyone been experiencing the same problems? and if so, have you managed to get rid of them from any solution?

Thanks in advance for your help