There seems to be an issue with Zabbix trapper items and time-based triggers. The specified evaluation period seems to be ignored and the trigger acts as if no evaluation period has been defined.

Both the following triggers fail in the sense that they fire immediately without waiting for the specified delay time to pass:

{Template_KNX:3_5_123.min(60)}=1

Expected behaviour: Trigger should fire only if the item stays in the problem state (value '1' = problem) for more than 60 seconds.
Actual behaviour: Trigger fires immediately as soon as the problem state is detected.

Another example:

({TRIGGER.VALUE}=0 and {Template_KNX:3_5_124.last(0)}=1)
or
({TRIGGER.VALUE}=1 and {Template_KNX:3_5_124.max(5m)}=0)

Expected behaviour: Trigger should fire immediately and only be reset if the item returns to the normal state (0) for at least 5 minutes.
Actual behaviour: Trigger gets reset immediately.

STEPS TO REPRODUCE:

1. Create an item with the following configuration:

Name: Test
Type: Zabbix trapper
Key: test
Type of information: Numeric (unsigned)
Data type: Decimal
[...the rest are default values...]

2. Create a trigger with the following configuration:

Name: Test trigger
Expression: {Template_test:test.min(60)}=1
[...the rest are default values...]

3. Test the trigger:

zabbix_sender -z zabbix_server -s hostname -k test -o 1

Wait for a few seconds.

Expected behaviour: Trigger will fire after 60 seconds.
Actual behaviour: Trigger gets fired immediately.