AppArmor permission denied for Unix proxy device

ubuntu@ubuntu:~$ sudo cat /var/snap/lxd/common/lxd/security/apparmor/profiles/lxd_forkproxy-PASocket1_pmp
#include <tunables/global>
profile "lxd_forkproxy-PASocket1_pmp_</var/snap/lxd/common/lxd>" flags=(attach_disconnected,mediate_deleted) {
  #include <abstractions/base>

  # Capabilities
  capability chown,
  capability dac_read_search,
  capability dac_override,
  capability fowner,
  capability fsetid,
  capability kill,
  capability net_bind_service,
  capability setgid,
  capability setuid,
  capability sys_admin,
  capability sys_chroot,
  capability sys_ptrace,

  # Network access
  network inet dgram,
  network inet6 dgram,
  network inet stream,
  network inet6 stream,
  network unix stream,

  # Forkproxy operation
  /var/snap/lxd/common/lxd/logs/pmp/** rw,
  @{PROC}/** rw,
  / rw,
  ptrace (read),
  ptrace (trace),

  # Needed for lxd fork commands
  /snap/lxd/current/bin/lxd mr,
  @{PROC}/@{pid}/cmdline r,
  /var/lib/snapd/hostfs/{etc,lib,usr/lib}/os-release r,

  /home/ubuntu/pulse-native rw,
  /var/lib/snapd/hostfs/run/user/1000/pulse/native rw,
  /var/lib/snapd/hostfs/run/user/1000/pulse/native rw,

  # Things that we definitely don't need
  deny @{PROC}/@{pid}/cgroup r,
  deny /sys/module/apparmor/parameters/enabled r,
  deny /sys/kernel/mm/transparent_hugepage/hpage_pmd_size r,
  # The binary itself (for nesting)
  /var/snap/lxd/common/lxd.debug      mr,
  /snap/lxd/*/bin/lxd                 mr,

  # Snap-specific libraries
  /snap/lxd/*/lib/**.so*              mr,

# Entries from LD_LIBRARY_PATH

  /snap/lxd/current/zfs-0.8/lib//** mr,
  /var/lib/snapd/lib/gl/** mr,
  /var/lib/snapd/lib/gl32/** mr,
  /var/lib/snapd/void/** mr,
  /snap/lxd/18140/lib/** mr,
  /snap/lxd/18140/lib/aarch64-linux-gnu/** mr,
  /snap/lxd/18140/lib/aarch64-linux-gnu/ceph/** mr,
  /snap/lxd/18140/zfs-0.6/lib/** mr,
  /** mr,
  /snap/lxd/18140/lib/** mr,
  /snap/lxd/18140/lib/aarch64-linux-gnu/** mr,
  /snap/lxd/current/lib/** mr,
  /snap/lxd/current/lib/aarch64-linux-gnu/** mr,
  /snap/lxd/current/lib/aarch64-linux-gnu/ceph/** mr,
}