I looked today into it as well. I could reproduce it with current git master.
``` root@proxy-1:/usr/local/src/kamailio-devel# grep "^Oct 7 18:38.* qm_status:.*alloc'd" /var/log/syslog | cut -d: -f6- | sort | uniq -c | sort -n | grep core/cfg/cfg 1 alloc'd from core: core/cfg/cfg_struct.c: cfg_shmize(217) 1 alloc'd from core: core/cfg/cfg_struct.c: sr_cfg_init(324) 1 alloc'd from core: core/cfg/cfg_struct.c: sr_cfg_init(336) 1 alloc'd from core: core/cfg/cfg_struct.c: sr_cfg_init(348) 1 alloc'd from core: core/cfg/cfg_struct.c: sr_cfg_init(355) 1 alloc'd from core: core/cfg/cfg_struct.c: sr_cfg_init(362) 2 alloc'd from core: core/cfg/cfg_ctx.c: cfg_register_ctx(47) 2 alloc'd from core: core/cfg/cfg_struct.c: cfg_clone_global(627) 80 alloc'd from core: core/cfg/cfg_ctx.c: cfg_set_now(559) 81 alloc'd from core: core/cfg/cfg_struct.c: cfg_child_cb_new(830) 84 alloc'd from core: core/cfg/cfg_struct.c: cfg_clone_str(130) root@proxy-1:/usr/local/src/kamailio-devel# kamcmd core.version kamailio 5.4.0-dev0 (x86_64/linux) 7cd263-dirty ```