Minecraft: why do monsters spawn in my house?

ot
- in PlayStation
5

I built a pretty big house in Minecraft (PS4) and it was also completely lit from the inside with torches and Glowstone. The doors are iron doors so no mobs should actually come in. Zombies, creepers, spiders etc. Often spawn in the house. Can anyone explain that?

EDIT: The mobs only spawn on the 2nd and 3rd floor, not at the bottom.

Lo

Thought you hadn't lit… Or left the door open… Hammer, if you know why, Tell me.

Ka

Maybe there's not enough light somewhere in a corner and so they can spawn in your house. I built a pretty big castle in minecraft and didn't light a spot so they got in

ot

Yes, but I really filled the floor with torches everywhere and glowstone in the corners. Furthermore, there's no vacancy where anyone could enter. On the bottom floor there are 2 iron doors with a button on the side to open. So I really have no idea how they spawn there.

Ka

Then I don't know what to do next, sorry. If you don't want a monster, you could turn the difficulty off.

ot

Yep, I always do it when I go into my house (unfortunately). Anyway, thanks for the answer