Manjaro ISO files have always needed to use DD mode in Rufus
The Rufus developer joined the old forum in 2019 and this was discussed with the Manjaro Team
- https://archived.forum.manjaro.org/t/so-what-the-heck-happened-to-the-bug-tracker/83789
- https://archived.forum.manjaro.org/t/make-manjaro-installer-images-work-with-rufus/83876
- https://archived.forum.manjaro.org/t/testing-manjaro-gnome-18-1-0-juhraya-pre2-iso/85754/11
From those conversations Rufus was developed so users could not select ISO mode for a Manjaro ISO
rufus/ChangeLog.txt at master · pbatard/rufus · GitHub
Version 3.7 (2019.09.09)
Disable ISO mode when Manjaro ISOHybrids are being used
( Disable ISO mode has also been added for PopOS )
And the developer edited the FAQ to a much less ranty style
FAQ - GRUB | pbatard/rufus Wiki