Without touching any configs, my server is back to a failure situation

I'm not sure if I'm facing the exact same thing, but for some strange reason, without introducing any modification in the servers, one leg is not hearing voice (outgoing traffic), while incoming rtp traffic goes fine, so I have to assume another time that some Update has destroyed it

I've mostly done the same checks as before.

I started to assume that rtp-engine could be failing by the same cause, but I have updated to the latest version and still the same issue

This has happened from 2-3 day to now.

Any ideas on how to start trying to find the cause?

Versions: Kamailio 4.1.4

RTP Engine: 4.1.0.0

Kind regards,