shortcoming of cockpit ?

[old sixpack13]

I playing around with F37 Server, Cockpit, btrfs mirror under vbox:

created a mirror with:
mkfs.btrfs -L MyMirror -m raid1 -d raid1 /dev/sdb /dev/sdc

fetched the UUID with:
btrfs fi show

setup the /etc/fstab:
UUID=<MyMirror's-uuid>  /home/DATA  btrfs device=/dev/sdb, device=/dev/sdc,compress=zstd:1  0  0
or
UUID=<my-uuid-here>  /home/DATA  btrfs compress=zstd:1  0  0

rebooted

when I look at cockpit's "Storage" I see both disks are mounted, but also at the most right side a exclamation mark for /dev/sdc.
clicking down to the /dev/sdc:

=> "The filesystem is not mounted"
=> "Inconstistent filesystem mount"
=> "The filesystem is currently not mounted but will be mounted on the next boot"

Is it a shortcoming of cockpit ?

cause no hints in dmesg and the mirror is usable e.g. fillable via smbshare and both disk do have the same fill level.

[old sixpack13]

Arggghhh
...
> UUID=<my-uuid-here>  /home/DATA  btrfs compress=zstd:1  0  0

...

sed 's/my-uuid-here/MyMirror's-uuid/g'