Solar analysis calculated points

Hello everyone,
I am facing a problem in using solar analyst node in Dynamo. When I am applying the node on some surfaces (not all surfaces), the number of cumulative radiation points do not match the number of calculation points. For instance, as you can see in the screenshot, while there are 800 radiation points, there are only 420 calculation points. This also cause error in visualizing the results.
I was wondering if anyone faced this issue or has a solution for it.