Overthrow problem is not only in career mode. It's also in competition matches and worst in online matches.
Most of the times the back up fielder inside the circle won't collect the ball at all and watch the ball even it passes between his legs.
And fielder in the deep is worst. Once the overthrow passed the circle, I can clearly say that it's gonna be boundary. The deep fielder starts running towards the boundary and collects the ball after crossing the line, instead of running towards the ball.