Hi all, new to manjaro forums, but not to manjaro (using it for the last 5 years). This weekend I faced the same problem after updating, and what solved the problem for me was downgrading mkinitcpio to 34.2. I don’t have BTRFS but EXT4. The only thing I have in common is that my Manjaro installation is in an external SSD connected by USB.
I tried to change kernel, to replace grub by refind and some more checks, but in everyone I did, I faced the same problem. Only downgrading mkinitcpio solved the problem for me. Just trying to give more info to this issue.
If you need any info about my config, I will be glad to help.