Getting alert Emails from root and not from name i configured.

Further to an upgrade from 10.2.3 to 11.6.0, I am seeing the same change in behavior. In 10.2.3, the configured "fromaddress" in /config/user_alert.conf was used for the sender's name and email address: From: my.big-ip@domain.co.uk [mailto:my.big-ip@domain.co.uk] However, in 11.6.0, it is only used for the sender's email address - the sender's name is now "root". From: root [mailto:my.big-ip@domain.co.uk] I'm happy everything is configured okay but am keen to retain the original behaviour. Any ideas? Paul