New Topic Create URL is not working for Subcategory

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2

Try it: https://meta.discourse.org/new-topic?title=topic%20title&body=topic%20body&category=howto/faq&tags=email,planned
https://meta.discourse.org/new-topic?title=topic%20title&body=topic%20body&category=howto/faq&tags=email,planned

More: Compose a new pre-filled topic via URL