Hello
I'm currently running a Vega64 with Adrenalin 2020 20.3.1 on Windows 10 x64 and this is still an issue.
Though the devs have provided a version with slightly more than half of the vertical resolution of the original video, which also runs on Windows 7/8, it's still a huge let down, since this already worked with an older driver.
The attached information is from the original video made with mediainfo.