White line in the top screen when watching a fullscreen video on MacOS big sur

Whenever watching any video on full screen, a white line appears at the top. I have noticed the same issue reported in the Answers Microsoft community almost 3 months ago but it still is not fixed. Other browsers such as Chrome have not presented the issue. 

https://answers.microsoft.com/en-us/microsoftedge/forum/all/white-line-in-the-top-when-watching-a-fullscreen/a1bc1078-c645-4c42-9237-b0a647bac716