When you ctrl + pickblock a chest, and place the chest with data, next to a chest with the same data, it has issues such as visually opening the first chest placed when clicking on the second chest, items in first chest not being seen, and not being able to take things out of either chest. If any more info or testing is needed, let me know.
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We're tracking this issue in MCPE-44905, so this ticket is being resolved and linked as a duplicate.
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