Notify if unreplied function won't work


In settings-> email account, there is an option called notify if unreplied.
We want use to notify users a new issue is coming in support module via email.
email function is working but notify if unreplied not. Which means I cannot find out the notify email in email queue whatever the status is.
Please advise how I can troubleshooting this issue.
I’m using v12.2.0 erpnext app, and support module auto reply to customer function is working also.


This actually works for us, but it doesn’t follow the number of minutes we set. For example, we set 60 minutes but we get notifications several hours later.

ERPNext v12.10.1