microcode hook in initcpiocfg conflicts with postcfg or postcfg conflicts with initcpio
As both microcode images is installed on the ISO root filesystem - it has been configured in postcfg to remove the obsolete microcode image based on the host CPU.
Since initcpiocfg and the following initcpio will add both microcode to init - the target system will experience boot failure as the postcfg removes one of the microcode packages with out updating initfs.
https://forum.manjaro.org/t/iso-calamares-grub-issue-ucode/158906/12
Edited by Frede H