There’s something I noticed about the demo…

I already completed the demo with all three of my mii characters. I can’t do anything else except listen to them advertise the full game while stuck in their houses. However, I saw the relationships between two of them have changed. When I don’t go on the game for a while it changed from good friends to ultra friends, but what concerned me was when one of the things changed to “not getting along”. This worries me since in my canon these characters are supposed to be best friends. I’m not sure if there’s a way to get them back to being friends or if I have to restart the demo. Does anyone know anything about this?