sellingPlanGroupsCount returns 0 when variant has selling plans

[Anthony_SL]

When querying variants with productVariants, variants with selling plans return a count of 0 for sellingPlanGroupsCount, even when you can see the sellingPlanGroups have nodes.

Is this a bug, or have I misunderstood sellingPlanGroupsCount?

Example pictured here:

Query:

{
  productVariant1: productVariant(
    id: "gid://shopify/ProductVariant/40292651761828"
  ) {
    id
    title
    sellingPlanGroupsCount {
      count
      precision
    }
    sellingPlanGroups(first: 10) {
      edges {
        node {
          name
        }
      }
    }
  }
  productVariant2: productVariant(
    id: "gid://shopify/ProductVariant/40292651827364"
  ) {
    id
    title
    sellingPlanGroupsCount {
      count
      precision
    }
    sellingPlanGroups(first: 10) {
      edges {
        node {
          name
        }
      }
    }
  }
  productVariant3: productVariant(
    id: "gid://shopify/ProductVariant/42379248533668"
  ) {
    id
    title
    sellingPlanGroupsCount {
      count
      precision
    }
    sellingPlanGroups(first: 10) {
      edges {
        node {
          name
        }
      }
    }
  }
}

Response:

{
  "data": {
    "productVariant1": {
      "id": "gid://shopify/ProductVariant/40292651761828",
      "title": "xs",
      "sellingPlanGroupsCount": {
        "count": 0,
        "precision": "EXACT"
      },
      "sellingPlanGroups": {
        "edges": [
          {
            "node": {
              "name": "Subscribe and save"
            }
          }
        ]
      }
    },
    "productVariant2": {
      "id": "gid://shopify/ProductVariant/40292651827364",
      "title": "small",
      "sellingPlanGroupsCount": {
        "count": 0,
        "precision": "EXACT"
      },
      "sellingPlanGroups": {
        "edges": [
          {
            "node": {
              "name": "Subscribe and save"
            }
          }
        ]
      }
    },
    "productVariant3": {
      "id": "gid://shopify/ProductVariant/42379248533668",
      "title": "Default Title",
      "sellingPlanGroupsCount": {
        "count": 0,
        "precision": "EXACT"
      },
      "sellingPlanGroups": {
        "edges": []
      }
    }
  },
  "extensions": {
    "cost": {
      "requestedQueryCost": 24,
      "actualQueryCost": 14,
      "throttleStatus": {
        "maximumAvailable": 2000,
        "currentlyAvailable": 1986,
        "restoreRate": 100
      }
    }
  }
}