My Nether map got wiped?

I made a map, then I went into the Nether, and opened it. This made a map of the area in the Nether around me (as expected). I then left the nether, and expanded my map I just created (surrounded it with 8 pieces of paper in a crafting bench) in the overworld. When I pulled the map back out, it was completely blank.
I tried to fix it by switching it out and back in again, and by re-entering the nether, but it made no difference.
What happened?
Best Answer
This happened to me too, luckily I was in creative going to the nether. I opened my map in the nether and it was completely glitchin out... anyways when you come back out of the nether portal, is it still saves the stuff from the nether, which then it will not see you once you are in the over world, and so when the game cannot sense you it will freak out-therefore your map will go blank... this is my assumption though. What happened with me is that I went back to the overworld and my map was still in the nether... but it did not go blank. I really think this is the answer to what happened so.... yeah
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How do I find my way back in the Nether?
Maps work in the Nether, although the map must be crafted in the Nether. Maps crafted in the Nether do not work in the Overworld, and vice versa. Maps made in the Nether will not display any terrain because the roof of the world is covered in bedrock rendering them useless.Do maps still work in the Nether?
You cannot reset the nether without making a new world. There always are nether fortresses in the nether so keep looking.Can you still reset the nether?
Will the mobs despawn in the Nether? Nether portals act as a loading anchor around them. So if you push a mob through it will not immediately despawn, but run its normal despawn timer.Minecraft Streamer's Dying \u0026 Losing Their Hardcore Worlds *emotional*
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Images: Olya Kobruseva, Olya Kobruseva, Oleksandr Pidvalnyi, Tima Miroshnichenko