Index_cache can result in the incorrect index.

[cianciosa]

Indices are stored in the used indices indexed via the argument pointer. However

index_1D(a, b, 1, 0)
index_1D(a, b, 1, 1)

Would point to the same pointer index. Instead try using the node index of the parent node since that should be unique if the arguments are different.

[cianciosa]

This was done because 2D nodes requires two second index so you cannot use the parent node pointer.

[cianciosa]

Create a new type of unqiue argument node which can encapsulate the scale, offsets and argument node with a unique pointer.