PQuery / Data models: Dynamic table changing format when encountering null/empty values

Hi all, hoping the community can give me a hand.

As the title says, I have a dynamic graph that plots data from a query in the data model, but when it encounters empty or null values it resets itself.

Pre-empty values

Empty Values

Post empty values

I already tried changing advanced graph settings "Properties follow data points" to no avail. Also, since im working with external queries I do not know if I can and should modifu the whole data structure to change null/empty values (it could be more bothersome for other effects).

Hope the community can guide me on this issue!