When I place a bed down one of the long sides was rendering incorrectly. What they do is the two rendered textures are reversed. I went into f3 mode to test the cause. Of what I concluded the cause is when a long side of the bed is facing north or east.
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263rd duplicate of MC-37106 - If you have not , please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.