This is the seed used: -8507564153105616350
The worlds were created using a single biome cherry grove world
2 worlds were created on the same Windows computer, and the trees were different, but the terrain was the same.
The seed was generated again on a Mac computer, and the trees were the same as in the first instance on the Windows computer.
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Thank you for your report!
We're tracking this issue in MC-55596, so this ticket is being resolved and linked as a duplicate.
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Does this issue also occur in vanilla?