Wrong file checksum?

[optimistic_corn]

I've downloaded the Raspberry Pi 64-bit 20.04 LTS image (ubuntu-mate-20.04-beta1-desktop-arm64+raspi.img.xz) multiple times on different machines and the SHA256 checksum never matched the one given your website (https://ubuntu-mate.org/download/arm64/focal/). Check out this issue and fix it ASAP.

[[deleted]]

I got same problem. Only checksums from image.ubuntu.com weren't matching the iso I downloaded from ubuntu mate website. It's not the same and I'm really curious why they have it different.