Problems with ubuntu-mate-20.10-desktop-arm64+raspi.img.xz

1- the "writable" partition is too small : installation abort with "disk full" at the end.

2- the media has an MBR partition table which prevents the use of large disks ( 4 To)
The PI400 boots on a GPT partition, but the installer ends in initramfs!

Ubuntu mate 20.10 partition table : sdc2 is too small :