Special characters are not allowed in cookies per RFC 2109, 2965, and
6265. However, when storing a Data Element value for a Session in DTM,
the value is not URL-encoded in the session storage cookie that DTM
creates. This lack of URL encoding of whitespaces and special characters
many of my Data Element values contain caused multiple services on one
of my sites to fail when trying to parse those non-compliant cookies.
Please update DTM libraries to automatically encode and decode values
stored ...