microcloud init fails on CephFS when using IPv6

[roosterfish]

MicroCloud version: latest/edge
LXD version: latest/edge
MicroCeph version: latest/stable

When selecting an IPv6 addresses for MicroCloud, it looks to be failing during CephFS setup:

Error: Failed to mount "fd42:4c88:a791:d989:216:3eff:fe97:243c:6789,fd42:4c88:a791:d989:216:3eff:fe6d:c28e:6789:/" on "/tmp/lxd_cephfs_3143952555/mount" using "ceph": invalid argument

The complete questionnaire:

root@m1:~# microcloud init
Waiting for LXD to start...
Select an address for MicroCloud's internal traffic:

 Using address "fd42:4c88:a791:d989:216:3eff:fe97:243c" for MicroCloud

Limit search for other MicroCloud servers to fd42:4c88:a791:d989:216:3eff:fe97:243c/64? (yes/no) [default=yes]: 
Scanning for eligible servers ...

 Selected "m3" at "fd42:4c88:a791:d989:216:3eff:fe6d:c28e"
 Selected "m2" at "fd42:4c88:a791:d989:216:3eff:fea3:e648"
 Selected "m1" at "fd42:4c88:a791:d989:216:3eff:fe97:243c"

Would you like to set up local storage? (yes/no) [default=yes]: 
Select exactly one disk from each cluster member:

Select which disks to wipe:

 Using "/dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_volm1--local" on "m1" for local storage pool
 Using "/dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_volm2--local" on "m2" for local storage pool
 Using "/dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_volm3--local" on "m3" for local storage pool

Would you like to set up distributed storage? (yes/no) [default=yes]: 
Select from the available unpartitioned disks:

Select which disks to wipe:

Do you want to encrypt the selected disks? (yes/no) [default=no]: 
 Using 1 disk(s) on "m3" for remote storage pool
 Using 1 disk(s) on "m2" for remote storage pool
 Using 1 disk(s) on "m1" for remote storage pool

Would you like to set up CephFS remote storage? (yes/no) [default=yes]: 
What subnet (either IPv4 or IPv6 CIDR notation) would you like your Ceph internal traffic on? [default: fd42:4c88:a791:d989::/64] 
Configure distributed networking? (yes/no) [default=yes]: 
Select an available interface per system to provide external connectivity for distributed network(s):

 Using "enp6s0" on "m1" for OVN uplink
 Using "enp6s0" on "m3" for OVN uplink
 Using "enp6s0" on "m2" for OVN uplink

Specify the IPv4 gateway (CIDR) on the uplink network (empty to skip IPv4): 10.23.252.1/24
Specify the first IPv4 address in the range to use on the uplink network: 10.23.252.100 
Specify the last IPv4 address in the range to use on the uplink network: 10.23.252.200 
Specify the IPv6 gateway (CIDR) on the uplink network (empty to skip IPv6): 
Specify the DNS addresses (comma-separated IPv4 / IPv6 addresses) for the distributed network (default: 10.23.252.1): 
Initializing a new cluster
 Local MicroCloud is ready
 Local LXD is ready
 Local MicroOVN is ready
 Local MicroCeph is ready
Awaiting cluster formation ...
 Peer "m3" has joined the cluster
 Peer "m2" has joined the cluster
Configuring cluster-wide devices ...
Error: Failed to mount "fd42:4c88:a791:d989:216:3eff:fe97:243c:6789,fd42:4c88:a791:d989:216:3eff:fe6d:c28e:6789:/" on "/tmp/lxd_cephfs_3143952555/mount" using "ceph": invalid argument

[roosterfish]

Not sure about the format but maybe we are missing the brackets [ipv6] around the address?