Segmentation fault when running two mta-server64 instances on the same machine

[R4ven47]

Describe the bug

Took a few hours after launching a test server of the same version as the main running server on the same machine and different ports for the main server to crash due to a segmentation fault.

Steps to reproduce

Run two servers on the same machine on Ubuntu 20.04 x64.

Version

Server version: Client version:

Additional context

The server back then used to crash after a few weeks due to an issue I already reported and pushed a fix for, after that it ran fine without shutting down for months. It resurfaced again after running another instance of mta-server64, the machine has more than enough power to handle it both in RAM and CPU. (Intel Xeon E3-1240v5, 32GB DDR4)

Relevant log output

No response

Security Policy

• [X] I have read and understood the Security Policy and this issue is not security related.