Why does aborting a rule not abort?

When we have a rule queued and try to abort it, nothing happens. It’s like the abort itself gets placed in the queue… While that is waiting to abort, any new executions (triggers from S3 upload) are still skipped because it sees that aborted run as still in queue. This doesn’t make sense; aborting something should be immediate. I’ve never seen this behavior anywhere else and it’s becoming an issue today.