I've seen nether portals being duplicated due to linking problems before, but I can't seem to replicate that on purpose. I'm trying to create a sort of manual obsidian farm that doesn't involve withers and doesn't use the End. Alternate methods of obsidian farms are welcome, as long as they don't require me running 128 blocks in the overworld.
Here's what I've tried: A portal in the overworld, and a lever that is connected to a dispenser on a delay filled with lava(which breaks the portal). I thought that if I timed it right and flicked the lever right before entering the nether, it would break the portal and duplicate it upon reentering the corresponding portal in the nether. However, when I came back to the overworld, the lava placed at that exact moment and broke the portal THEN. Is this because the chunks were unloaded when I entered the nether? This setup wasn't built in the spawn chunks, and I can't move it to the spawn chunks since this is a server I doubt people would want their main portal to be replaced by a nether portal duplicator.