When i pass the nether portal some chunks dont charge and sometimes the game crashes when i use the nether portal

Thank you for your report!
However, this issue is a Duplicate of MCPE-63268.

If you would like to add a vote and any extra information to the main ticket it would be appreciated.

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Please also note, you have raised this issue against the Bedrock Dedicated Server product whereas it appears to be related to the Minecraft game itself (the project for which can be found here). This project is only for the dedicated server software .

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