When you log into the world or come back from the nether the bed disappears the only way to get it back is to destroy it and place it again.
Comments 2
Cleaning up old tickets: This ticket has not been updated recently (~1 year+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.
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The only problem I had (and it was probably fixed by now) was the bed disappearing when you walk far away from it, and when you get closer to it, the bed re-appears...