Investigate Heroku app errors

[Mottokrosh]

Currently, the app throws many errors in Heroku.

[Mottokrosh]

There is a memory leak, possibly in a 3rd party dependency, resulting in the app crashing on average twice a day. This results in unresponsiveness, followed by a downtime of a few minutes, before Heroku automatically reboots the app.

[Mottokrosh]

At first I thought it might be due to in-memory sessions, but I replaced that module with a reportedly non-leaky version, but the memory leaks still occur, perhaps at a reduced rate though.