Simulation error-Illuminance, Radiation, Luminance

Hello everyone,

I'm quite new to Grasshopper and I'm trying to perform a point in time simulation on two simple building rooms.

I'm applying the same algorithm to two rooms that are geometrically equal. When I perform the calculation on an analysis grid comprehensive of the two rooms (global) everything works, but when I split the grid, the calculation is done only in one room (522) and in the other (521) I have as a result null values. (see attached files)

Do any of you know the reason for this? Could you please help me to understand what is the problem? Thank you in advance for your help.