Steps to reproduce:

1. Use template_net_generic_snmp
2. Check interface tags

Result:

All interfaces have unresolved variable name {#IFALIAS} as tag

Expected:

I expected resolved variable => text in the tag or no tag at al.

It appears somebody else hit this problem but that ticket was closed.
https://support.zabbix.com/browse/ZBX-20532

The discovery does NOT discover/fetch {#IFALIAS}
https://git.zabbix.com/projects/ZBX/repos/zabbix/browse/templates/net/generic_snmp/template_net_generic_snmp.yaml?at=refs%2Fheads%2Frelease%2F6.0#302

          snmp_oid: 'discovery[{#IFOPERSTATUS},1.3.6.1.2.1.2.2.1.8,{#IFADMINSTATUS},1.3.6.1.2.1.2.2.1.7,{#IFNAME},1.3.6.1.2.1.2.2.1.2,{#IFDESCR},1.3.6.1.2.1.2.2.1.2,{#IFTYPE},1.3.6.1.2.1.2.2.1.3]'
 

Therefore all interfaces get description:{#IFALIAS} tag.

It seems to be same in master;
https://git.zabbix.com/projects/ZBX/repos/zabbix/browse/templates/net/generic_snmp/template_net_generic_snmp.yaml#305

It seems to be a simple bug?