intl-icu is not working in production mode

[Salamek]

messages+intl-icu.en.neon:

event:
    week: '''
        {week, selectordinal,
            one   {#st}
            two   {#nd}
            few   {#rd}
            other {#th}
        } week
    '''

default.latte:

{_"messages.event.week", ['week' => $weekInMonth]}

Debug mode (how it should look):

Production mode:

WTH ?
PS: Yes i cleared all caches, version v2.6.0