It is related to a problem reusing the data calculated for far field (divergence) into backpropagation for calculating the size. The easy shortcut is to use Source for backpropagation: Recalculated. This should be a bit longer but it is always recommended. <img width="871" height="156" alt="Image" src="https://github.com/user-attachments/assets/5fc4cc09-7af2-4eb3-8a0d-715d2d92a01d" />
It is related to a problem reusing the data calculated for far field (divergence) into backpropagation for calculating the size.
The easy shortcut is to use Source for backpropagation: Recalculated. This should be a bit longer but it is always recommended.