Bug tactics

In the middle of my games the defensive line suddenly became like 99 but the numbers remains on 50, I’m leading 2-0 my team does a great work and suddenly there is no defenders and cb standing on the half what is this? 
didn’t change anything did only minor subs it’s happening always from the 70 min, even if my opponent decide to take down his defensive line go on counters or to push me it’s not suppose to change my tactics.

if there is a cheat then share with us EA..

also when I want to put pressure on my opponent when he wasting time my player stay on their side even on 424 99 defensive line and adding team pressure from manual tactics.. 

if something broke then fix it please people trying to enjoy the game you know