Party Chat Bug?

Has anyone had issues where random chat messages appear under party chat when not in a party? I have had random messages from characters that could be bots and don't know if this is intentional or is this the result of someone up to no good. It's happened multiple times at North Aelio on ship 4 with the most recent occurrence on block 10. Should I report to Sega?

when NPCs appear in the map they talk to everyone in the party chat even through they are not in the party, if the messages are something like thanking you for the help or something similar while keeping imersion is one of the NPCs, if is not like that then someone found a loop hole in the chats

@Jamesmor Thanks for clearing that up. The messages I received had no context so I wasn't sure what was going on.