Column and Line chart - Line is missing

Hi - I have created a simple chart comparing target and actual budget categories. It works fine when the chart type is column only - both data series show up fine.

However, when I change to Column and Line, only the column shows and no line.

Please help! Screenshots of the 2 scenarios would have been attached but apparently I need “points”

Up voted your question so you should be able to attach a sample file.