Failed jobs on eu-central-1 stack (AWS EU)

We have discovered a problem on one of servers running Queue jobs on eu-central-1 stack (AWS EU). Jobs were terminated unexpectedly in between 08:20 UTC and 09:20 UTC. The problem has been removed and all jobs should be running OK now again. We are still looking for the root cause to prevent it happening again in the future. We apologize for any inconvenience this may have caused.