Slack alert was fired with hours of delay

### Environment SaaS (https://sentry.io/) ### Steps to Reproduce I'll share the details in the Jira ticket ### Expected Result Slack alert should have arrived almost immediately ### Actual Result Slack alert arrived hours later ### Product Area Alerts ### Link _No response_ ### DSN _No response_ ### Version _No response_ ┆Issue is synchronized with this [Jira Improvement](https://getsentry.atlassian.net/browse/FEEDBACK-2270) by [Unito](https://www.unito.io)