I've recently had problems with players going from full stamina and on 99 fitness at the start of a rivals or fut champs match and even fut friendlies

The game starts as normal but by the 2nd half upto roughly 50 to 60 mins the players bar is red and some players are even black. Not just 1 player but every player. Even players with 99 stamina eg shapeshifters mbabu. My gameplay is how it has always been and it's on balanced gameplay. I've even tried uninstalling the game and re -installing. Has anyone else had this problem it's very frustrating.