Igor wave display

I have an Igor wave which I extracted from electrophysiological recordings. When I display the wave, I can see the graph that I want but when I double click the wave to look through the points, the wave looks empty. Can anyone help figuring out why is this happening? 

I attached the picture of the displayed wave and the wave itself.

 

Many thanks in advance! 

This is how the wave is displayed wave with about 5500 points

When I display the wave in a table

Edit/K=0 root:Cm_1_1_1_Cm

I see it has NaNs for points 0-11 and then the data starts, i.e. if I scroll down the table a bit I can see the data.