This bug is rather theoretical, but in the new “Free Build” mode it can happen: The progress-bar of the upgrade-points can only handle one extra-point per day. If you have more than 60 Researcher / Explorer and thus get more than 1 upgrade-point per day, the bar will extend to the right.
I guess there is only a test like
if(progressbar_value > progressbar_max){
progressbar_value -= progressbar_max;
upgradepoints++;
}
then a solution could be
while(progressbar_value > progressbar_max){
progressbar_value -= progressbar_max;
upgradepoints++;
}
