Geen line in top left corner

I bought my Macbook Air like 3 months ago. After the first week of using this mac, I noticed a green line in top left corner. I thought it might be just something common/some software issue, and I thought it would go away soon. It disappeared after like 2 days, and appeared now several times through the past 3 months. I have tried the following so far: restarted my device, update macOS software to the latest - currently on macOS Ventura 13.2.1. The only thing I can think of is to go to an Apple service/store to have my mac checked, but I do not want to bother the support with something that could be some kind of software issue, etc... Any help would be appreciated. Thanks

(Disclaimer - I know there is another question regarding this topic, but it is old and I thought that maybe someone has already found a solution to this problem. By the way - I tried to take a screenshot of the line, but it does not appear on the image.)