I also observe sporadic errors with:
Error response from daemon: stat /var/lib/docker/btrfs/subvolumes/a28d807f83e6131a6e43e062a73e7cbff496746e2dfceecc39a27483cabcd0d4: no such file or directory
I also observe sporadic errors with:
Error response from daemon: stat /var/lib/ docker/ btrfs/subvolume s/a28d807f83e61 31a6e43e062a73e 7cbff496746e2df ceecc39a27483ca bcd0d4: no such file or directory