Cannot use TRIGGER.URL in action message

[kuwa]

I use user Macro in "TRIGGER.URL".
It seems now explode.

---------------------------------
*User Maxro
---------------------------------
{$HOST1} = 'myhost.com'

---------------------------------
*Trigger
---------------------------------
Name = TRIGGER-{$HOST1}
URL = {$HOST1}

---------------------------------
*Action Default Message
---------------------------------
HOST: {HOST.NAME}
TRIGGER NAME: {TRIGGER.NAME}
URL: {TRIGGER.URL}

---------------------------------
*Result:
---------------------------------
HOST: myhost.com
TRIGGER NAME: TRIGGER-myhost.com <--- exploded.
URL: {$HOST1} <--- NOT exploded.
~~~~~~~~~~

Zabbix Version is 2.2.1.

[BDiE8VNy]

The macros can be used in [...] trigger names and expressions [...] but not in trigger url.
See: User macros and Additional support for user macros

There is a request for resolving internal macros: ZBXNEXT-1128