For both of the errors below we are using the Template SNMP Interfaces object. This is actually 2.0.0rc4 nightly build 27282 as we were trying a more recent version to see if fixed.

Attempting to Export a template which has discovery appears to work, however the generated XML file is like the one attached.

Similar and probably related which is why only one ticket is being created, a full clone of the same template generates the following from the frontend UI:

Created: Application "Interfaces" on "Template SNMP v1 Interfaces".
Created: Item "Number of network interfaces" on "Template SNMP v1 Interfaces".
Created: Discovery rule "Network interfaces" on "Template SNMP v1 Interfaces".
Created: Item prototype "Incoming traffic on interface $1" on "Template SNMP v1 Interfaces".
Created: Item prototype "Outgoing traffic on interface $1" on "Template SNMP v1 Interfaces".
Created: Item prototype "Description of interface $1" on "Template SNMP v1 Interfaces".
Created: Item prototype "Operational status of interface $1" on "Template SNMP v1 Interfaces".
Created: Item prototype "Admin status of interface $1" on "Template SNMP v1 Interfaces".
Created: Item prototype "Inbound errors on interface $1" on "Template SNMP v1 Interfaces".
Created: Item prototype "Outbound errors on interface $1" on "Template SNMP v1 Interfaces".
Created: Item prototype "Alias of interface $1" on "Template SNMP v1 Interfaces".
Undefined index: expression [api/classes/CTriggerPrototype.php:1332]
Undefined index: expression [api/classes/CTriggerPrototype.php:1334]
Cannot implode expression "".