beginAtZero does not work when null values are present in data to render empty values

[raaahuuulll]

I added null values to o,h,l,c of the last few elements of the dataset in order to show empty spaces when the data is not present. It works for that part that there is empty space for the candles but the beginAtZero functionality does not work in this case. Hopefully I am able to communicate my problem.