[2021] Game thinks my "General" room is outside?

A lot of screenshots of the rooms with the room info in the bottom right would be useful, as I can hardly imagine the situation.

I guess you don't play with the currently still default-off setting that makes empty blocks remove the eligiblity for a room, so it might think due to how you build it that it is a room with many holes, just reducing the tier of the room massively due to the hole, but still allowing it to be a valid room.