DH rendering things that don't exist

I transferred a world from 1.20.6 to 1.21 and used DH for the first time in it. DH shows things (like the jungle trees in the screenshot) from the original world, not from what is built in it. One of the screenshots is the world with increased render distance and no DH, the other is with DH and it has more trees.
Things I have already tried that did not work:
  • resetting config
  • testing other worlds, including some made in the same version
  • 1.20.6 minecraft with DH for 1.20.6 has the same issue
  • relaunching game
  • disabling all other mods, texture packs, etc
  • updating the chunks with these issues
Does anyone know how to fix this?
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