This is something that could definitely have been reported to Slack before disclosing it publicly. Maybe he did that, but it's not mentioned in the blog post so I assume he didn't.
It's just a nice thing to do and they might reward you for it. You can still post it on your blog after they released a fix.
It's just a nice thing to do and they might reward you for it. You can still post it on your blog after they released a fix.