It looks like the container is running under confinement and that confinement is not allowing snap-confine to do its business. Note that the profile name is ‘lxd-still-chigger_’, which is not the snap-confine profile. I suspect that lxd is not using LXD stacking here and apparmor policy for snap-confine is not being loaded.
What kernel are you using? Is this an Ubuntu kernel?