/dev/loop0 getting disappeared post system restart after lxc creation

I was trying to install lxd. After successfully completing the set up with btrfs file system, I rebooted the system.

Post that I cannot find any entry of lxd storage pool in list.(df-hT).
All the created containers are stopped and giving error on lxc start.

Please help.

You’re not giving much details on what’s wrong.
What LXD version is it, is it the deb or snap, what errors are you getting, what’s in the logs, …