Here's how I encountered this:

• Visit https://sourcegraph.sgdev.org/github.com/sourcegraph/website/-/blob/STYLEGUIDE.md?view=code#L15%3A2=&tab=discussions&createThread=true

The discussions extension is not disabled in my user settings or client settings. Is anyone else able to repro? If not, what might be different between our accounts?

cc @slimsag