Microsoft's consent mode is not working with multiple countries

[vaelu]

To be honest, I don't know if there is even a "fix" for this – probably not. But I still open this issue in case someone is also investing 10 hours to find out why the Bing tag does not work correctly (like I did 😅).

So basically, we use a setup for some clients where we have 2 tags of this consent tag in the same container, 1 for all EEA countries with all consents set to denied by default, and 1 tag for Switzerland where consent is set to granted by default.

For Google's consent mode this works, because the API supports including countries, like this (EEA example):

gtag("consent", "default", {
  ad_storage: "denied",
  analytics_storage: "denied",
  ad_user_data: "denied",
  ad_personalization: "denied",
  personalization_storage: "denied",
  functionality_storage: "denied",
  security_storage: "denied",
  region: [
    "AT",
    "BE",
    "BG",
    "HR",
    "CY",
    "CZ",
    "DK",
    "EE",
    "FI",
    "FR",
    "DE",
    "GR",
    "HU",
    "IE",
    "IT",
    "LV",
    "LT",
    "LU",
    "MT",
    "NL",
    "PL",
    "PT",
    "RO",
    "SK",
    "SI",
    "ES",
    "SE",
    "NO",
    "IS",
    "LI"
  ]
})

However, since Microsoft's consent mode does not support this, having 2 of these tags will "break" the setup and just use the settings which are loaded last.

I don't know what's the best workaround here. Any suggestions?