Probably makes sense to report it in current ticket, but as a bug (let me know if separate ZBX is actually required):

 "Problem Triggers" view may show Tempalate names instead of hosts names.

I'm trying to collect more information, as it's strange why we see zero (0) for column "zabbixNbActiveTriggerLastchange".
Maybe issue not with template vs host name, but actually including wrong things to the view.

From the support ticket our suggestion:

 
About the refresh time - we had some internal discussion about that. A caching is needed for this table, as e.g. we make a snmp-walk over the table, then it should not request each item again and again. But we know that other values are cached for several seconds as well, see:

{{ "CacheLifeTime": 5, // Number of seconds how long query will be cached”)}}

This cache lifetime should be used for that as well and not the cache for the mapping table.