Crossbow Enchantments Stacking, Multiple of The Same Enchantment

Pillager obtained crossbows enchanted with the same enchantment twice. As shown, piercing 1 and piercing two. To replicate, just loot a vanilla pillager's crossbow. No mods no plugins no nothing. Affects patrols, raids, spawned by egg, spawned by spawner block, and by /summon. Occurs in Singleplayer and Multiplayer