trigger [ template/item.regex("#") = 0 ] does not work

[kill9fan]

Hello, experts
I trying filter out some ports (ifAlias contains char '#') from it being triggered. But statements like

...and {mytemplate:kifAlias[{#IFNAME}].str('#')}=0 ....
...and {mytemplate:kifAlias[{#IFNAME}].regex('#')}=0 ....
...and {mytemplate:kifAlias[{#IFNAME}].regex("\#")}=0 ....
...and {mytemplate:kifAlias[{#IFNAME}].iregex('#')}=0 ....
...and {mytemplate:kifAlias[{#IFNAME}].iregex('#')}<>1 ....

are do not bring results. How I can match strings contains symbol '#' (in trigger statements)?

zabbix3.2