This was indeed the issue! My cmdline was previously systemd.unified_cgroup_hierarchy=1. Changing it to systemd.unified_cgroup_hierarchy=false as suggested smooths the transition from 5.2 to 5.3. Thanks!
This was indeed the issue! My cmdline was previously systemd.unified_cgroup_hierarchy=1. Changing it to systemd.unified_cgroup_hierarchy=false as suggested smooths the transition from 5.2 to 5.3. Thanks!