So I recently built a portal to the Nether in my Overworld house, and on the Nether side of the portal, I build a sort of cobblestone shack around the portal.  You can only enter or exit the shack via a redstone powered iron door with a button on both sides.  I also placed a soul torch outside of the door to keep away piglins.  However, somehow I ended up with two zombie piglins - one inside my portal room in my Overworld house, and one inside my Nether shack.  The piglins would have had to either randomly spawn inside or glitch into my well lit shack, or else have ignored the soul torch and used the button to power the iron door before walking through the door into my shack and entering my portal to the Overworld.  I was under the impression that Piglins were not supposed to be able to open iron doors and that they were to stay away from any placed soul fire objects.  Thanks.