How to reproduce:
1) Name shulker box in an anvil
2) Place it. It has your name.
3) Break it and remove name in the anvil. It gets its default name.
4) Place it again. It has your previous name but not default one
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Thank you for your report!
However, this issue has been closed as a Duplicate of MC-113869.
It has been linked to this report. If you have additional information, please add it to the duplicated report.
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