I don’t know how to reproduce this but it happened 2 times

What happened: I was I creative then (for the 2 event I think it was enchanted netherite boots) I but enchanted netherite boot on armour stand ( because I am in creative the item stay in my inventory) after that I try removing the enchanted netherite boot out of my inventory but a weird glitch happens: they are kinda stuck at were they are in my hot bar ( when I press them and switch them at a other place they “move” but they undo and stay were they were before ( they stuck there until you die)

how to reproduce this: I don’t seriously know how to

only to show this is by a video.