Even if you use the /tick rate command to speed up or slow down the game, the expansion and shrinking speed of the world border remains unaffected.
MC-300415
Using /tick rate does not affect the world border.
Resolved
Duplicate
1
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We're tracking this issue in https://report.bugs.mojang.com/servicedesk/customer/portal/2/MC-53491 , so this ticket is being resolved and linked as a duplicate.
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