Enchantments apply in random order

Would MC-272540 describe your issue?

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No, I'm saying reload enchantments (even nothing changed) shuffle the order they applied, based on reloaded properly.

It was the hard reload that will shuffle the order, which means the order can be different after each single player world reopen or server restart.

I installed the provided datapack and tried to enchant my sword with "sharpness2" but no such enchantment existed. Can you verify the integrity of the datapack?

It's fine fore me, did you rejoin the world?

You can customize the order of enchantments via the #minecraft:tooltip_order enchantment tag. If you don't add a custom enchantment to that tag, it'll put the enchantment in an arbitrary position when loading the datapack because you didn't specify an order.

Edit: I misunderstood this bug report; I don't think tooltip order affects the order in which enchantments are applied, but maybe it does? If not, does the order in the data component change upon reload as well?

Confirmed; tooltip order does not affect the order in which enchantments are applied; the order in the data component does not change upon reload as well.