My front door does not stay as front door after manually setting

I have two buildings on a residential lot. One is my greenhouse, another is my actual house. The greenhouse door is defaulting as the front door. I have to keep manually setting the door to my house as my front door. However, it will not stay. I have set my actual house door as the front door multiple times. I'm unsure exactly when it switches back.

I have no mods or CC. I currently have them disabled.

My door is accessible and is not locked. There is no issue with anyone entering or exiting the house using that door.

I'm on PC Windows 10.