I have a filter with a subscription to send to a group of people. I've set the frequency to every 15 minutes, and even checked "Email this filter, even if there are no issues found".
In the subscription screen it shows that it should send the subscription in 15 minutes. That 15 minutes comes and goes, and no e-mail is sent.
However, all other notifications work fine - and when I click "Run now" on the subscription, it sends the e-mail with no issues.
How do I fix this?