I have setup a discovery rule. The check are :
type: SMNPv2 agent, port: 161, community: : public, OID: .1.3.6.1.2.1.1.1.0
type: SMNPv2 agent, port: 161, community: : public, OID: .1.3.6.1.2.1.1.2.0
type: SMNPv2 agent, port: 161, community: : public, OID: .1.3.6.1.2.1.1.3.0
type: SMNPv2 agent, port: 161, community: : public, OID: .1.3.6.1.2.1.1.4.0

Then, I go in Monitoring->Discovery
I only see the detection of
.1.3.6.1.2.1.1.1.0, .1.3.6.1.2.1.1.3.0 and .1.3.6.1.2.1.1.4.0

If, on the command line, I use snmpwalk or snmpget with the same "addresses", i can read the 4 values.

The standard address .1.3.6.1.2.1.1.2.0 contains the OID of the device which I want to use to select the templates,...

I believe that Zabbix choke on the type of this field which is OID. Just modify the case in order to consider OID field as a string should fix the problem and make Zabbix easier to use.