When a barrier block is viewed in the inventory, the hotbar, or an item frame, the barrier has a square, black background around it. This may be considered inconsistent with all the other block textures, and is also not shown as a block form.
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This also applies to cauldrons.
Thank you for your report!
We're actually already tracking this issue in MC-163001, 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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