Markdown links to anchors not working?

For the markdown version, you can now include a heading:

### My Heading

My Heading

And copy the auto-anchor link it creates by clicking/long-pressing next to it:

https://meta.discourse.org/t/markdown-links-to-anchors-not-working/150175/7#my-heading-1

https://meta.discourse.org/t/markdown-links-to-anchors-not-working/150175/7#my-heading-1