Like @DizzyMoonflower said, I also have a third sim with the "Neighbour" tag on him (Raj Rasoya in this case) but for some reason he's not joining the other two and the event never triggers like it should. The other two were just standing there, waiting on him and Raj just keeps popping in and out of his apartment, taking out trash or sorting his mail. I had my sim go talk to those two in front of my door and they both have the social "Thank for coming" and the other one has additionally "Agree/decline to hang out" socials available.
Product: The Sims 4
Platform: PC
Which language are you playing the game in? English
How often does the bug occur? First time coming across the issue
What is your current game version number? Latest game version
What expansions, game packs, and stuff packs do you have installed? All expansions, game and stuff packs
Steps: How can we find the bug ourselves? Create or place a sim, move into a lot, house or apartment, wait for the 'welcome wagon' social event
What happens when the bug occurs? Sims are outside the door but no notification received and stand there with fruitcake and won't leave until I toggle the 'send home' action
What do you expect to see? Sims come for the event, notification triggered and then leave
Have you installed any customization with the game, e.g. Custom Content or Mods? No, brand new installation of the game
Did this issue appear after a specific patch or change you made to your system? No
