Prepopulated field appears to not work as expected

Just testing this feature but having some issues.

Tried this

https://eu.jotform.com/build/91043877086363?name[first]=John

AND This

https://eu.jotform.com/build/91043877086363??name[first]=John

But nothing happens - In edge is removes the parameters from the URL altogether.

What am I missing?

I actually want to populate this one https://eu.jotform.com/build/91043877086363?ticketNo=123456

Also can we make that field read only so only the parameter can populate it?

I also want to prevent submitting the form unless that field has a value so we don't get random rubbish.

Michael

This is a re-post of a comment on Prepopulating Fields to Your Jotform via URL Parameters