Maybe it was fixed once before but the lead ropes attached to fences sometimes seem to break for no reason. Mobs are able to escape. The other half of the time the lead registers as connected to the mob, but the actual rope part connecting the mob to the fence appears missing.
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duplicates
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violine1101
migrated
Thank you for your report!
We're actually already tracking this issue in MC-14826, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
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