to see the bug, just pick up a non-stackable item and press the equip button several times. That's all, if you try to delete it through the creative, you will need to delete it as many times as you have pressed the equip button to leave one sword again and the other needs to be thrown away and picked up.
Thank you for your report!
We're actually already tracking this issue at MCPE-84368, 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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