Good catch. It's possible that Google doesn't allow ; as separator.
In that case, parameterize form-urlencoded-separator to "&;" or just "&".
This parameter is for uri-common, which defaults to ";&" because
of the recommendation in the HTML spec to prefer ";" as separator, but
to also allow "&" on input. The reason is the former doesn't have to be
specially encoded in HTML.
Cheers,
Peter
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