Not makes no Brutality (Mortal Kombat 11)

Guys? I went today to the League, received Brutally on sub-zero (the Freezer), received as the suspect, usually all give when ending Combat League, and so, Brutale does not want to be made 3 times, and still not a channel that reinforced that the usual,used without a combo, used it to be that easy, what can be wrong?