The version of Minecraft the mod is running on: 1.18.2

The version of the mod I was using: V2.0.1.2

So, I was setting up a surival world in creative mode for myself, I teleported the Wither Storm to the center of the world with me being about 2,000 blocks away from it. Also the generation type I used was "AMPLIFIED". I left the world, and when I joined back, there were two Wither Storms in the distance! PS: Both Wither Storms were in their fourth phase.

To Reproduce...

1. Make a World.
2. Save and Exit the world.
3. Rejoin the world.
4. Witnedd the Duplication.

If you go to one of the duplicates, are you able /kill it or do any other command on it?

I had this same problem, i'm playing in a server, and when i turned it off and came back it duplicated (it only happened once though) i think it is in phase 6 or 7? (after it has been formidibombed)
Also It only appear as one (at least It only shows one health bar)

version is 1.18.2, Forge 40.1.73

Okay, I also tried to use kill, but what was duplicated for me wasn't the storm, but the segments, there were like 20 of them lol, 15 overlapped on a same place

@Hac-kDUBS164 Any other mods?

I had this same problem, i'm playing in a server, and when i turned it off and came back it duplicated (it only happened once though) i think it is in phase 6 or 7? (after it has been formidibombed) Also It only appear as one (at least It only shows one health bar) version is 1.18.2, Forge 40.1.73

This looks like segment duplication #222

Fixed as of prerelease
#222