Using tokens & custom field in url

I am trying to solve an issue where i need to send a token to send within an email however I also need to use a custom field in the link,

So i have something like this in the href: {token_url}{customfield=domain_name}

The problem is that it only shows the {token_url}. Anyone have an idea how to solve this ?

so no reply yet, and unfortunately i have not managed to solve the problem yet.

Basically if i send inside an email {token_whatever}={contactfield=whatever123}, this will generate exactly what is being passed through in the payload as well as whatever123 value from the contact card, however the moment I put this into an href tag the only thing that still shows up is the {token_whatever}.

I have tried with {{token_whatever}}{{contctfield=whatever123}} - no joy
I have tried with single parenthesis instead of double in the href tag - no joy.

I am guessing this is probably something to do with GrapeSJS stripping something or messing with something along the way.

Still holding out for a solution from someone here.