Underscore in parameter breaking cookies

  • I’m experiencing issues with the Cookie Monster plugin when a url parameter contains an underscore.

    Some of our advertising platforms use underscores in the parameters like “utm_adgroup” and things similar to this to identify what ad an user comes from.

    When a parameter is just one word, it sets a cookie perfectly. When a parameter contains an underscore it doesn’t set a cookie. It looks like the underscore breaks the plugin.

    Can you offer any assistance?

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