After two years i did a dist-upgrade on one particular system and this is still an issue. I have to wonder why it got moved to btrfs-progs. This really seems like a sequencing matter because all of the btrfs devices aren't found before the system attempts to mount /. That makes me think that it is an issue with initamfs-tools, especially since those of us who have submitted potential fixes for it in this bug did so against initramfs scripts.
I'm glad I had my script changes elsewhere and could migrate them from one system to another when i encountered this problem. It would just be nice to have it incorporated at the source.
