Many thanks for the info.
I know it’s unrelated but I think that install.wim + wimboot was a much safe way to manage a resilient system.
I have taken a look at the disk structure and it seems we have 2 efi partition,
I assume boot menu is in bios and it points directly to 1 of the 2 uefi partition ignoring the other.
Probably a boot loader like clover could be a more clean solution but this way you are not messing with os installs…
anyway I am still curious about the disk structure, -BTW android partitioning looks like a real mess!