I converted my 1.17.1 world to 1.18 pre-release 5, I walk for a little bit and I found, the biome is not changed, in the ocean, mountains
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I apologize if this isn't the right way to submit this kind of information but I believe I have found the specific issue. From my testing I believe that if a world has had world generation edited from the original generation, such as changing the biomes, when upgrading the world to the 1.18 Pre-Releases or Release Candidates the existing biomes will be overridden with one biome. As can be seen in the screenshots I'm providing, the biome I'm in is a mountain which is near a Jungle and Savannah, which is in 1.17.1. However, when upgrading the world to 1.18 Release Candidate 3 the biome changes to Ocean and the Jungle and Savannah change into an ocean which is seen from the tint of the foliage. I have also provided the zipped worlds for both loaded in 1.17.1 and loaded in 1.18 Release Candidate 3. That all being said, I'm not sure if this counts as a bug to the world gen I'm providing being edited from the original seed of the world.
Again, I apologize if this isn't the correct way to be providing this information.
World in 1.18 Release Candidate 3
Apologies for the update to my comment, had to find a better way to provide a download to the zipped world files for my screenshots.
We do not have enough information to find the cause of this issue.
Please attach the affected (zipped) 1.17.1 world file. If the file size is too large, please upload it somewhere else and then link to it here.
This issue is being temporarily closed as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
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