Updated the 1903/1909 Updates Overview with 18362.10024: https://forums.mydigitallife.net/th...pc-19h1-2-release.79259/page-148#post-1525792
1909 just got released on MVS, and he can ask at adguard's forum. As long as the checksums are correct, not matters where it's downloaded from.
I've just downloaded both 32bit & 64bit 1909 ISOs from there at close to 240mbps (megabits per second), using a CAT6 ethernet/LAN cable connected to my bedroom PC [measured my internet speed thru speedtest.net]. only took about 5 minutes for the x64 ISO and about 3 minutes for the x86 version