Chart won't show zero percent

[PURVIANCE]

I am doing a pie chart using a quick style design that shows the lines in
between the different percentages. Some of the charts show a percentage with
the lines when the value is zero and two of my charts erase all but one of
the lines when a zero is placed in one of the cells. What's up with that?
and How do I correct it?

 

[Bernard Liengme]

Since with zero value the lines of the pie would be on top of each other, I
am not sure what one would expect to see!
best wishes