Possible to create link from prefill querystring parameter?

Possible to create link from prefill querystring parameter?

Hello.

I have a form that takes a prefill querysting parameter for a product stock code and uses it to populate a single line textbox. I'd like to be able to use that value to create a link in a description field using the token like: ${zf:SingleLine1}. Having tested this it seems like the value is resolved in text but not in the href attribute of the link. See this page for an example, the first link looks correct but doesn't work:
https://forms.zohopublic.eu/canford/form/zDynamicLinkTest/formperma/uggWc1ZkMS_7lYOtw-LScjWwlwA1I5glMQo2qchhWfg?stockcode=41-031

Is there any way to be able to use field values to construct link urls?

Thanks,
Pete.