it looks upgrading to 5.58 should fix the memory leak issue, from the release notes:
5.50: Fixed a memory leak in the WIN32 logging subsystem (this one should be unrelated)
5.57: Fixed memory leaks on configuration reloading errors
5.58: Fixed a tiny memory leak in configuration file reload error handling (thx to Richard Könning)
it looks upgrading to 5.58 should fix the memory leak issue, from the release notes:
5.50: Fixed a memory leak in the WIN32 logging subsystem (this one should be unrelated)
5.57: Fixed memory leaks on configuration reloading errors
5.58: Fixed a tiny memory leak in configuration file reload error handling (thx to Richard Könning)
Is it possible to upgrade it to 5.58 on bionic?