I noticed that whenever I moved an item from one slot to another, the item would move but it would leave a gray duplicate behind it, and so for a split second there were two of the same items, and then the gray one would go under the color version.
in the photo, I moved the gold sword, and the white one is the one following it
Thank you for your report!
We're actually already tracking this issue at MCPE-79889, so I will resolve and link 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.
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