We have a lot of AWS instances. Currently Zabbix use IP of instance as HOST.CONN value if instances autoregistered. But as you probably know at stop/start of EC2 instance IP of this instance will be changed (until you assign EIP to it).
It would be really helpful to have feature, maybe like and checkbox or stm like this, which allows update host's IP/FQDN if host with same name already present.

Other option is to allow to use hostname as HOST.CONN value because all other instances have fqdn as hostname.