Steps to reproduce:

1. Create a zabbix trapper item float
2. Set a trigger on trapper item last(//trapperitem)>0
3. send 2 values via zabbix_sender with timestamp in diffenerent order
4. "TEST" trapperitem 1668167005 0 (timestamp=now)
5. "TEST" trapperitem 1668166866{} 1 (timestamp=old){}
6. Check Alerts

Result:
Alert rises. But on latest Data the order is the right one.
Expected:
No Alerts. The latest Value should be 0 because of the order via timestamp parameter.