Disconnected from server randomly; then server full

Game mode: [Online | Multiplayer]
Problem: [Crash | Bug | Performance | Misc]
Region: [Here]

I get randomly disconnected from server (official server) - at first I thought it would disconnect me because I played too long. But it just happened after 5-10 minutes today - i basically had just logged in.
Then I try to hop back in, server full - what is this?

Steps on how to reproduce issue:

  1. Play on a server from 10 minutes to 8 hours