I'm not getting email notifications from error monitoring

I have an app in production which has been having some runtime errors, which are monitored with Ionic Pro. I can see the errors in my Ionic Pro dashboard. I have “Error Monitoring Events” notifications enabled in my settings, but I didn’t actually receive any emails. I only found out about the errors directly from customers.

Is this a known issue? Email notifications used to be working, but they stopped some time ago. I haven’t received an email since July 12, but I’ve definitely had runtime errors since then.