Above ground Abandoned mineshaft fail to generate in badland biome, above ground mineshaft only generate dirt room without any rail but some cobweb still generate.
Comments 2
Cleaning up old tickets: This ticket has not been updated recently (~7 months+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue and is affecting the most recent versions, then please comment, or create a new ticket following the Issue Guidelines.
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Maybe the seeds simply had no mineshafts in the mesa. This may not be a bug. Mesa biomes don't always generate mineshafts.