The center coordinate of the world border must be a decimal. Watch the video attached. https://drive.google.com/file/d/16CblFbNm3o1gb4UtbXG8KPJFrtsipRTw/view?usp=sharing
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Despite that, I can confirm, though the exact behavior shown in the video can only be reproduced on the north and west sides of the world border.
Thank you for your report!
After consideration, the issue is being closed as Working as Intended.
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Considering MC-63578 is triaged as a bug, this is probably WAI.