Intermitent 404 on rss feeds
Hi,
I'm running cad7584 with docker. I subscribed to some rss feeds. From time to time, instead of having a 200, I get a 404. I was advised to remove "-d:release" from nimble build to get logs. But they're not super helpful.

Here's the log both when it worked and when it didn't.

```
DEBUG GET /reuters/rss
DEBUG   200 OK {"content-type": @["application/rss+xml; charset=utf-8"], "min-id": @["HBaCwKeF+P7q6CQAAA=="]}
DEBUG GET /reuters/rss
DEBUG   404 Not Found {"content-type": @["text/html;charset=utf-8"]}
```

 