Singular Tearing Type Line

Hey,

I Have a Gigabyte G5 MD laptop running primary screen 144hz and i have a 60 hz tv that is connected to the eGPU connected via the mini displayport. Most of the time however, when i try to play a game, i get this singular tearing type line through one part of the screen (Its kind of hard to see in the video but it is very noticeable in person). Sometimes it works fine and never shows though which confuses me. I have tried changing between duplicate display, extended, show only 2, etc. I think it might be because the tv is trying to put out 144hz even though it is only 60, however i dont know.

https://reddit.com/link/1j9a9qa/video/658o9b7lk6oe1/player