Prebid v7.39.0: drop in Rubicon delivery

[davidballester]

Type of issue

A question regarding Rubicon.

Description

We're updating Prebid.js from v7.38.0 to v7.39.0. This causes a drop on our Rubicon delivery.

This is a sample payload to the auction endpoint we make when using v7.38.0. Please notice I've omitted the consent string:

{
  "id": "7fe816ef-4bde-4187-93c6-de0e0e6d50b1",
  "test": 0,
  "cur": [
    "USD"
  ],
  "source": {
    "tid": "7fe816ef-4bde-4187-93c6-de0e0e6d50b1"
  },
  "tmax": 3000,
  "imp": [
    {
      "id": "carodaVirtualSlot1",
      "secure": 1,
      "ext": {
        "rubicon-rubicon": {
          "accountId": 25432,
          "siteId": 512596,
          "zoneId": 3075890,
          "video": {
            "language": "sk",
            "size_id": 203
          },
          "position": "btf"
        },
        "tid": "7fe816ef-4bde-4187-93c6-de0e0e6d50b1",
        "prebid": {
          "auctiontimestamp": 1717494856190
        }
      },
      "video": {
        "api": [
          2
        ],
        "context": "outstream",
        "h": 347,
        "linearity": 1,
        "maxbitrate": 29494983,
        "maxduration": 120,
        "mimes": [
          "video/mp4",
          "video/x-ms-wmv",
          "video/webm",
          "application/javascript",
          "video/ogg"
        ],
        "minbitrate": 104,
        "minduration": 5,
        "placement": 3,
        "playbackmethod": [
          6
        ],
        "playerSize": [
          [
            617,
            347
          ]
        ],
        "plcmt": 4,
        "protocols": [
          2,
          3,
          5,
          6,
          7,
          8
        ],
        "skip": 0,
        "useCacheKey": false,
        "w": 617,
        "pos": 3
      }
    }
  ],
  "ext": {
    "prebid": {
      "channel": {
        "name": "pbjs",
        "version": "v7.38.0"
      },
      "cache": {
        "vastxml": {
          "returnCreative": false
        }
      },
      "targeting": {
        "includewinners": true,
        "includebidderkeys": false,
        "pricegranularity": {
          "ranges": [
            {
              "max": 20,
              "increment": 0.1
            }
          ]
        }
      },
      "bidders": {
        "rubicon": {
          "integration": "pbjs"
        }
      },
      "aliases": {
        "rubicon-rubicon": "rubicon"
      }
    }
  },
  "site": {
    "page": "https://www.cas.sk/clanok/2925975/babis-s-monikou-prekvapuju-najskor-rozchod-a-teraz-foto-hovori-za-vsetko/",
    "content": {
      "language": "sk"
    },
    "ref": "https://www.cas.sk/clanok/2927547/mato-durinda-ako-hokejista-prehovoril-o-drsnych-zraneniach-spomenul-aj-moment-ktory-mu-zmenil-zivot/",
    "domain": "www.cas.sk",
    "publisher": {
      "domain": "cas.sk"
    },
    "mobile": 0,
    "keywords": "hokej,andrej babis,rozvod,zapas,ms,monika babisova",
    "ext": {
      "data": {}
    }
  },
  "device": {
    "language": "en",
    "w": 970,
    "h": 966,
    "dnt": 0,
    "ua": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36",
    "lmt": 0,
    "sua": {
      "source": 2,
      "platform": {
        "brand": "Linux",
        "version": [
          "6",
          "5",
          "0"
        ]
      },
      "browsers": [
        {
          "brand": "Google Chrome",
          "version": [
            "125",
            "0",
            "6422",
            "141"
          ]
        },
        {
          "brand": "Chromium",
          "version": [
            "125",
            "0",
            "6422",
            "141"
          ]
        },
        {
          "brand": "Not.A/Brand",
          "version": [
            "24",
            "0",
            "0",
            "0"
          ]
        }
      ],
      "mobile": 0,
      "model": "",
      "bitness": "64",
      "architecture": "x86"
    }
  },
  "regs": {
    "ext": {
      "gdpr": 1
    }
  },
  "user": {
    "ext": {
      "consent": "<CONSENT_STRING>",
      "data": {}
    }
  }
}

When using v7.39.0, this is how the payload looks. Again, I've omitted consents:

{
  "imp": [
    {
      "ext": {
        "tid": "159b93c5-1165-40f0-8cfa-2bd4a8c788c5",
        "prebid": {
          "bidder": {
            "rubicon-rubicon": {
              "accountId": 25432,
              "siteId": 512596,
              "zoneId": 3075890,
              "video": {
                "language": "sk",
                "size_id": 203
              },
              "position": "btf"
            }
          },
          "adunitcode": "carodaVirtualSlot1"
        }
      },
      "id": "carodaVirtualSlot1",
      "video": {
        "api": [
          2
        ],
        "h": 347,
        "linearity": 1,
        "maxbitrate": 29494983,
        "maxduration": 120,
        "mimes": [
          "video/mp4",
          "video/x-ms-wmv",
          "video/webm",
          "application/javascript",
          "video/ogg"
        ],
        "minbitrate": 104,
        "minduration": 5,
        "placement": 3,
        "playbackmethod": [
          6
        ],
        "protocols": [
          2,
          3,
          5,
          6,
          7,
          8
        ],
        "skip": 0,
        "w": 617,
        "pos": 3
      }
    }
  ],
  "device": {
    "w": 970,
    "h": 966,
    "dnt": 0,
    "ua": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36",
    "language": "en",
    "lmt": 0,
    "sua": {
      "source": 2,
      "platform": {
        "brand": "Linux",
        "version": [
          "6",
          "5",
          "0"
        ]
      },
      "browsers": [
        {
          "brand": "Google Chrome",
          "version": [
            "125",
            "0",
            "6422",
            "141"
          ]
        },
        {
          "brand": "Chromium",
          "version": [
            "125",
            "0",
            "6422",
            "141"
          ]
        },
        {
          "brand": "Not.A/Brand",
          "version": [
            "24",
            "0",
            "0",
            "0"
          ]
        }
      ],
      "mobile": 0,
      "model": "",
      "bitness": "64",
      "architecture": "x86"
    }
  },
  "site": {
    "page": "https://www.cas.sk/clanok/2925975/babis-s-monikou-prekvapuju-najskor-rozchod-a-teraz-foto-hovori-za-vsetko/",
    "ref": "https://www.cas.sk/clanok/2927547/mato-durinda-ako-hokejista-prehovoril-o-drsnych-zraneniach-spomenul-aj-moment-ktory-mu-zmenil-zivot/",
    "domain": "www.cas.sk",
    "publisher": {
      "domain": "cas.sk"
    },
    "mobile": 0,
    "keywords": "hokej,andrej babis,rozvod,zapas,ms,monika babisova",
    "ext": {
      "data": {}
    }
  },
  "user": {
    "ext": {
      "consent": "<CONSENT_STRING>",
      "ConsentedProvidersSettings": {
        "consented_providers": "<CONSENTED_PROVIDERS>"
      },
      "data": {}
    }
  },
  "regs": {
    "ext": {
      "gdpr": 1
    }
  },
  "id": "707b7cf3-8881-4ccb-9e06-8b969bad0948",
  "test": 0,
  "tmax": 3000,
  "source": {
    "tid": "707b7cf3-8881-4ccb-9e06-8b969bad0948"
  },
  "cur": [
    "USD"
  ],
  "ext": {
    "prebid": {
      "auctiontimestamp": 1717495046639,
      "targeting": {
        "includewinners": true,
        "includebidderkeys": false,
        "pricegranularity": {
          "ranges": [
            {
              "max": 20,
              "increment": 0.1
            }
          ]
        }
      },
      "channel": {
        "name": "pbjs",
        "version": "v7.39.0"
      },
      "aliases": {
        "rubicon-rubicon": "rubicon"
      },
      "cache": {
        "vastxml": {
          "returnCreative": false
        }
      },
      "bidders": {
        "rubicon": {
          "integration": "pbjs"
        }
      }
    }
  }
}

I've tried to analyze the changes in rubiconBidAdapter.js code from one version to the other. But the changes are massive, so I'm unsure of where the issue could be. 😅

Any help would be really appreciated!

Expected results

I expected our delivery for Rubicon not to be affected by updating our Prebid.js from v7.38.0 to v7.39.0.

Actual results

Our delivery drops.

[dgirardi]

May be related to #9605

Some notable differences between old and new versions:

1. new version is missing plcmt
2. new version has bidder params under imp[].ext.prebid.bidder["rubicon-rubicon"] instead of imp[].ext["rubicon-rubicon"]
3. new version is missing site.content.language

[davidballester]

Hi, @dgirardi, and thanks for your quick response.

Yes, I imagine our issues are triggered by the changes from that PR.

I noticed, however, that according to the unit tests modified on that same PR, the position of the bidder params is supposed to be correct (here).

We haven't changed anything in the way we configure the bidder when updating from v7.38.0 to v7.39.0, and I could not find any mention in the docs about changes I should made to video format bids.

I'll look into the missing plcmt and site.content.language, but I'm not sure if they are enough to explain a total drop.

[davidballester]

For completion, this is the ad unit we use:

{
  "bids": [
    {
      "bidder": "rubicon-rubicon",
      "alias": "rubicon-rubicon",
      "params": {
        "accountId": 25432,
        "siteId": 512596,
        "zoneId": 3075890,
        "video": {
          "language": "sk",
          "size_id": 203
        },
        "position": "btf"
      },
      "crumbs": {
        "pubcid": "d86a0c82-cf6d-4486-8448-97777ff7e8a4"
      }
    }
  ],
  "code": "carodaVirtualSlot1",
  "mediaTypes": {
    "video": {
      "api": [
        2
      ],
      "context": "outstream",
      "h": 84,
      "linearity": 1,
      "maxbitrate": 29494983,
      "maxduration": 120,
      "mimes": [
        "video/mp4",
        "video/x-ms-wmv",
        "video/webm",
        "application/javascript",
        "video/ogg"
      ],
      "minbitrate": 104,
      "minduration": 5,
      "placement": 3,
      "playbackmethod": [
        6
      ],
      "playerSize": [
        [
          392,
          220
        ]
      ],
      "plcmt": 4,
      "protocols": [
        2,
        3,
        5,
        6,
        7,
        8
      ],
      "skip": 0,
      "useCacheKey": false,
      "w": 149
    }
  },
  "renderer": {
    "url": "data://data:text/html,"
  }
}

We use the same for both v7.38.0 and v7.39.0.

[robertrmartinez]

The main change between these two versions was that our VIDEO calls begain using the ORTB Converter Prebid Library instead of building the Payload itself.

So - a lot of changes happened.

But one thing that recently came up that we have seen did potentially effect monetization was solved with this PR #12108

TL;DR

Device wxh was being incorrectly set by the converter and has been fixed!