Item prototype with Calculated type shows different outputs in Host > Items and Host > Last data.

It appears that "Last value" field in Last data gets updated based on CacheUpdateFrequency parameter in zabbix_server.conf. It's also gets updated after issuing "zabbix_server -c /etc/zabbix/zabbix_server.conf -R config_cache_reload".

At the same time, the Formula field in Monitoring > Hosts > Items follows "Update interval" for that item prototype and gets updated accordingly.

Steps to reproduce:

1. Create item prototype with update interval of 10s.
2. Set CacheUpdateFrequency=120
3. Change item value. You'll see that Formula value would change as expected - in 10sec interval. However, Last value would change only in 120sec interval or if you reload configuration cache manually.