Be able to use discountApplicationStrategy: All when with different variants

[jacknavynicy]

When I applied the discountApplicationStrategy: All on same produt variants, it works fine:
output:

{
  "discountApplicationStrategy": "ALL",
  "discounts": [
    {
      "value": {
        "percentage": {
          "value": 20
        }
      },
      "targets": [
        {
          "productVariant": {
            "id": "gid://shopify/ProductVariant/46960668311869",
            "quantity": 5
          }
        }
      ],
      "message": "Volume discount"
    },
    {
      "value": {
        "percentage": {
          "value": 10
        }
      },
      "targets": [
        {
          "productVariant": {
            "id": "gid://shopify/ProductVariant/46960668311869",
            "quantity": 3
          }
        }
      ],
      "message": "Volume discount"
    }
  ]
}

But when it involved multiple variants, the second discount is not apply correctly:

{
  "discountApplicationStrategy": "ALL",
  "discounts": [
    {
      "value": {
        "percentage": {
          "value": 20
        }
      },
      "targets": [
        {
          "productVariant": {
            "id": "gid://shopify/ProductVariant/46960668311869",
            "quantity": 3
          }
        },
        {
          "productVariant": {
            "id": "gid://shopify/ProductVariant/46960668377405",
            "quantity": 2
          }
        }
      ],
      "message": "Volume discount"
    },
    {
      "value": {
        "percentage": {
          "value": 10
        }
      },
      "targets": [
        {
          "productVariant": {
            "id": "gid://shopify/ProductVariant/46960668311869",
            "quantity": 3
          }
        }
      ],
      "message": "Volume discount"
    }
  ]
}

It is useful because many products are with multiple variants.

Please upvote and add your use case if you find this useful.