The resolution of MC-216270 enables swapping the armor held in your hand with the currently worn armor by right-clicking. However, this functionality fails to operate when the two items are identical (with all NBT/Component data matching, like durability, enchantments, custom name). Only when a change occurs in one item's data, such as durability, can the pieces be swapped successfully. Attempting to swap two identical armor pieces results in no hand animation or sound feedback. It appears that the item usage isn't executed at all, but instead, it attempts to use the item in your offhand.
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After consideration, the issue is being closed as Won't Fix.
Please note that this is not the same as Working as Intended, as this bug report correctly describes behavior in the game that might not be the intended or desirable behavior, but it will not be fixed right now. Sometimes, this is because the issue reported is minor and/or impossible to change without large architectural changes to the code base.
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Well you wouldn't need to because the items are identical
If the nbt/components are different it does still swap it so there's no reason this needs fixing