Hi Antony
Are you connecting to mysql?
We had similar sounding issues and adding this to kamailio.cfg made a difference modparam( "db_mysql", "opt_ssl_mode", 1 )
I am using MySQL, but I didn't deliberately configure it to use SSL.
I'm using TLS for SIP client registration on port 5061. So I was hunting the issue down that rabbit hole.
https://www.kamailio.org/docs/modules/devel/modules/db_mysql.html#db_mysql.p...
I try to force disable SSL for mysql off by setting this to 1.
Restarted, let's observe for a hour or so. Usually the crashes occur after restarting. At the moment all 4 dev registrars have restarted without crashing in the first 2 or so minute. So this somehow looks promising!