How to challenge plays

Is there a secret to challenging plays in this years madden cause when I challenge plays, the ones that look like they should be overturned aren't, and the ones that don't look they should be overturned are and it confuses me cause the one that dont look like the should be overturned really looks like they shouldnt be overturned and I get nervous on challenging plays now, if yall know anything please help

well the only thing that i can come up with is wen a player makes the tapping animation even after they go out of bounds they will still be called in so dont waist your time out other than that all my challenges go through right

I've come to the same conclusion as bigb.

But MK, I saw you in the east coast lobby, or maybe it was headset.