the same post as I see it.
You have the same grey line, just displaced one notch further down the page. In either case, it shouldn't be there and to the best of my knowledge FTM is the only place I have ever seen it.
(Why is your sidebar wider than mine?)
🤷♂️ Safari 13.1.2 vs Safari 14.0? 🤷♂️
🤷♂️ MacOS 10.15 vs. MacOS 11.0 🤷♂️
🤷♂️ Different System font 🤷♂️
🤷♂️ kharma 🤷♂️
More: I've never seen that line.
I have seen it off and on for a good while. 😢