3RD ANNIVERSARY GAUNTLET

Dear ea I played the event 

3RD ANNIVERSARY GAUNTLET and I have 44 stars but in the match with the TOTS ( one before the last one ) I do everything as the tasks  say but the optional one that says (assist for 1 hat-trick ) I tried to complete it I tried with a player that gets +3 when he scores and with a normal player that the goals count normally but it doesn’t want to be done I don’t know why could you check it and possibly fix it . 
Thank you