pam-1.3.0-r3 update provides better values for maximum open files in /etc/security/limits.conf. This is good values on modern systems. However it was found that pam_limits.so  that actually setting the limits has bug that occurs in LXD containers, which results in incorrect limits handle. As a consequence, after reboot of containers SSH connection can be terminated. We will fix pam_limits.so soon, so that it will correctly handle limits inside containers.  In the mean time, DO NOT UPDA