Tootip shows wrong data point in column and line chart

I have a column chart and line chart with a secondary axis. I created a tooltip for the secondary y-axis and it shows the 2nd data point value at first data point and also again at 2nd. From there after it shows everything correctly. For some reason it skips the first data point tooltip and everything in the rest of the chart is correct. Can anyone advice me?

Thanks
ylsv