Before the last update to 1.16.2, I created a portal that went to the nether a bunch of times without issue. Now when I go to the nether in the same portal it will spawn a new portal outside of where it was originally. Instead of it being in my basement it is now outside of my house at the same level but different spot. Then I thought well maybe that portal link is just broken, I went to a village that is about 1000 block west and 1000 block north of my house and built a new portal thinking I would get a new spot in the mether to explore, I spawn back at the same spot in the nether as I did the first time. Then I went back to my house broke all portals and went back to the village one and broke that moved 25 blocks away and rebuilt it, still spawned in the Nether at the original spot. It is almost like the nether portals are all linking to the original spawn portal in the nether. I am running this in a Realm. Today I think I will make a backup and try to recreate the issue to make sure it is not a Realm issue.