Technician notification

Technician notification

Hi,
when a t echnician opens a new ticket from him self (he is the requester), he receives a notification as:
Acknowledge requester by e-mail when a new request is received (cause notification is enabled)

so, when a t echnician closes the same ticket he doesn't receives a notification also if:
Acknowledge requester by e-mail when the request is closed (enabled)

Why?  Is this an anomaly?
Thanks

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