I’m not an expert on this topic and not clear on how mender bootstraps with respects to efi files, and I think the mender team can better answer this, but you have an awful lot of efi files. My initial guess would be your uefi is going around the mender booltloader and trying to start from one of the Debian efi files instead of the mender efi file. @drewmoseley is there some documentation somewhere that explains how mender bootstraps itself with UEFI as i’m strugging to find anything to link to?