Webhook connect to post comments to WordPress working unreliably

I turned it back on yesterday and posted an article. The webhook claims it ran successfully:

REQUEST

RESPONSE

But it didn’t make the link on the article:

I’m going to turn off Sync Comment Data again, at least temporarily, so this article can get linked to its comment thread in Discourse, which was created correctly.

Clicking Redeliver didn’t make any difference.

Oh, and for what it’s worth, I disabled CloudFlare for the talk.tidbits.com domain, so it should just be passing traffic through now.

Other ideas about how to troubleshoot this welcome… Thanks!