Triggers with "All problems if tag values match" option do not work

Steps to reproduce:

1. create trapper item with value type "Character"
2. create trigger:
   1. Problem expression: {host:trap.str("DOWN")}
   2. OK event generation: Recovery expression
   3. Recovery expression: {host:trap.str("UP")}
   4. PROBLEM event generation mode: Multiple
   5. OK event closes: All problems if tag values match
   6. Tag for matching: Object
   7.  Tags:
      1. .Service: Zabbix
      2. Object: {{ITEM.VALUE}.regsub("^([A-Za-z]+) ([A-Za-z]+) .*$", \2)}
3. Send data:
   1. $ bin/zabbix_sender -z localhost -s host -k trap -o 'Object serviceA DOWN'
   2. $ bin/zabbix_sender -z localhost -s host -k trap -o 'Object serviceB DOWN'
   3. $ bin/zabbix_sender -z localhost -s host -k trap -o 'Object serviceC DOWN'
   4. $ bin/zabbix_sender -z localhost -s host -k trap -o 'Object serviceD DOWN'
   5. $ bin/zabbix_sender -z localhost -s host -k trap -o 'Object serviceA UP'

Result:
All problems will be resolved
Expected:
Problem with tag Object: serviceA should be closed.