Copying Worlds get stuck at 40%

Can confirm, this is happening on my game. 100 percent of the time. (On either android or Xbox One

Thank you for your report!
However, this issue has been temporarily closed as Awaiting Response

Is this still an issue in the latest version? If so, can you please add it to the affected versions (or mention it if you are not the reporter).

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Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Incomplete. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.

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📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki

Still an issue - caves and cliffs update 1.17.something as at 16 June 2021. Copy is working but looks like it has frozen at 40% for a LONG time. Can imagine lots of people pulling the plug (I would have if I hadn't seen this thread).