When opening an empty map for the first time it will not generate.
This was an 'empty map' I found in a cartographers chest in a village I was passing through.
Comments 2
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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Does MCPE-37710 describe your issue?