Please provide the following when creating the Ticket:

Game Version number: 1.3.0.18 (Steam)
Modded?: No
If modded, please list the mods:

Issue Description:
When hosting an MP game locally in Experimental branch, my brother is unable to see my passworded game in the MP lobby. He is also not able to join via Steam Invite. Stable branch works fine. My firewall is set to allow the same things for Experimental as Stable.