How do I create a link which opens Create Topic?

The link looks ok

https://meta.discourse.org/new-topic?title=topic%20title&body=topic%20body&category=support/wordpress&tags=wordpress.   

vs

https://community.goprojectpool.com/new-topic?title=topic%20title&body=topic%20body&category=client/consultancy&tags=email,planned

What happens when you try to create the topic? It may show Latest screen, but the topic will be added to the applicable category