I reverted back to r261 for a reason. If you insist on fiddling around with r322, perhaps follow Arch’s new instructions:
# Give a hint to update installation and configuration one after another.
:: To use the new features provided in this GRUB update, it is recommended
to install it to the MBR or UEFI. Due to potential configuration
incompatibilities, it is advised to run both, installation and generation
\$ grub-install ...
\$ grub-mkconfig -o /boot/grub/grub.cfg
@Yochanan I’m on grub-2.06.r261.g2f4430cc0-1-x86_64 which was installed from the live iso. Notice that I could boot to it while the option “manjaro” was available but couldn’t when there is only “UEFI OS”, both for the same drive.
Finally got it fixed. There are two UEFI entries: /boot/efi/EFI/boot/bootx64.efi and /boot/efi/EFI/Manjaro/grubx64.efi, and for some reason this latest one was disappearing.
I’ve reinstalled grub (again) and now the two entries appear (again) on select boot device.
Also now I use the manjaro .efi for both since the fist one does not boot: