Scalability with Redis?

In the docs it states that in order to scale colyseus you need Redis and Mongo.
I created a server that uses RedisPresence and ran it in two processes on two different ports.
Doesn't work. Always reports this error.

colyseus.js - onError => (0) seat reservation expired.

If I kill one of the processes, it works again.

  1. Is this a known problem?
  2. Is there a fix or workaround?

Thank you!