Cant login to server after disconnected at witch queen

Game mode: [Online]
Problem: [Crash]
Region: [EU]

We were at witch queen. My friend got disconnected right after we killed the queen. After that i cant connect to the server anymore. It starts to load (the progressbar screen) then it just goes back to main menu.

Steps on how to reproduce issue:

  1. enter witch queen instance
  2. kill witch queen
  3. disconnected from server for some reason
  4. cant reconnect to server

Seems like after around 10minutes he could connect again.