I discovered an issue with the Friends Locator module which is an official Developer Module: when you join a game using the Friends Locator, you can’t see any friends who joined prior to the time when you joined.
Upon inspecting the code, I did find an easy fix for this that can hopefully be updated in the actual module. Inside the FriendBillboard script on line 32, the CharacterAdded connection doesn’t take into account that some players’ characters may already be loaded when the module is initialized. By simply adding a line below the connection that runs the same code for existing characters, this is fixed:
