Yeah I'm on the same version, I had it, then I thought I got rid of it only for it to show up again but both time it wasn't directly after an update. the only way to get rid of it currently is third party software, On YouTube Britec09 had a video 2 days ago - link if you want it - https://youtu.be/siASAKVPUQU
Thanks for the link, I'll check it out.
But it's quite weird that just some random users, maybe 1%, got the header popping up without any addon to show it, so it sounds like Ms is randomly enabling it and use us as non-volunteers testers.
I never asked to test that header. On my personal pc and the laptop I have same windows version and no header, only on the surface 3 it happened! 😁