We have currently a bug with SuSE Liberty Linux and EFI boot, but only a lite subscription. That has no support, which is fine but is there still a way to report the bug? Other users would also benefit.
Some of the EFi systems will fail to boot after the first yum update because the provided shim-x64 package removes the shim*.efi files from EFI/centos/ inside the EFI partition. Copying those files from EFI/redhat to EFI/centos makes the system bootable again.