Trying to enchant an item with no enchantments component using /enchant succeeds but has no effect

Removing the enchantments component from an item also removes its ability to be enchanted by using the /enchant command. Trying to do so, however, results in the command succeeding despite the fact that no enchantment was added to the item.

How to reproduce:

1. Execute the following command:

   /give @s minecraft:diamond_sword[!minecraft:enchantments]

2. While holding the sword you were given, execute the following command:

   /enchant @s minecraft:sharpness

   → ❌ The command succeeds according to the message printed in the chat, but no enchantment was applied.

Expected result:

Either the command would fail, or the enchantments component would be added back onto the item and the specified enchantment applied.

Observed result:

The command succeeded but no enchantment was added.