LG 27GX790A vertical line/split screen after firmware update

This is a perfect example why they say don't update just for the sake having the latest version, specially if you don't have issues.

LG Switch showed a firmware update for my monitor so I did it, although it didn't mention having fixed the problem I had related to the screen not turning on after being on standby and have to unplug from the outlet, just mentioned fixed bugs and issues.

Now I have a new problem as you can see kinda reminds a before and after comparison . The workaround is turning off/on again so it disappears.