zabbix agent 64bit crashed on win2k12 after asking achitecture "-k system.sw.arch"

after command run "zabbix_get -s win_machine -k system.sw.arch" agent on win2k12 crashed without any messages in log, (debuglevel 3 or 4 say nothing important). Return only empty answer. Zabbix-agent service must restart or set recovery, otherwise not start automatically. Zabbix-agent 2.2.1 32bit working fine, is not affected, return right achitecture.