It has always been like this.
It isn't much of a problem for people in Prep+, so if it is vision, it isn't a huge investment in vision that is required. Also it may be an effect of energy and morale, so some increase in stamina/confidence/salary for your oline might help.
IRL a false start (jumping before the snap, not the time count violation) is often caused by being overmatched by a defender. I don't know if this is considered in GLB, but it might be why some teams in PW have more problems than others (in which case strength/agility/blocking increases may help and may explain why there is such a significant decrease in false starts in higher levels even before stamina/vision/confidence are trained).