Household member not allowed in household residence

Did he turn into your neighbor ? 

Sounds like this: Household members turning into neighbors/ Can't use doors (1.112.519/2.06) | EA Forums - 11867223 

crinrict No, in the one old save that I could find with the problem, his relationship tags are Soulmates, Co-Workers, Steamy, Amazing Compatibility and Fiancé. With mods enabled, I couldn't check his residence using MCCC before the invite; after the invite, his residence was what it should be: The Shipping Views. In the current (unmodded) game, after the invite (I don't have a save from after the bug appeared and before the invite on this save), substitute Spouse for Fiancé and add Best Friend  and Close. Might possibly be memory constraint related, I had two crashes switching between saves before I shut down Firefox, a notorious memory hog. (Do you want the Last Crash files?) In this save the bug showed up during a baby shower, I don't remember about previous instances.

I don't know if they get an actual bit or if it's just the tag showing (cause it doesn't always show up) when you hover over the Sim.

It usually fixes it self by travelling and other things.

Don't think I have an old save to check if they have the actual bit.

Did you never notice a tag when hovering over him ?

Went back to the bugged save again,  and he has Neighbor over his name when I hover over him. Hadn't noticed that before. And that tag did disappear when I went to another lot. And it persists after being invited in.

I've also seen Date over sims' names after the date is over.

Merging this then.