Oban stopped executing background jobs after Postgres image update until app redeployment

I have an Elixir/Phoenix app. I have updated postgres image to the latest version. After that Oban stopped executing new jobs. They were piling up in available state. Redeployment helped.

I don’t know how to debug this if this happen again. Has anyone seen this behaviour before? What could be the reason?

Could it be that Postgres stopped sending notifications?