Kamil Páral <kparal(a)redhat.com> has asked for fedora_prioritized_bug:
Bug 2113005: Live image made with BOOTX64.EFI from latest shim-x64-15.6-2 fails
to boot on some boards
--- Comment #62 from Kamil Páral <kparal(a)redhat.com> ---
Nominating as a Prioritized bug. I'm aware that it will probably not make
resolving this bug any faster, but I think it should be on that list.