View2D region_to_view and view_to_region return types are not being picked up as arrays

[Mysteryem]

The array_dimensions and array_length of the functions' return_values are set correctly and type is set to 'float' or 'int'.

Notably, collection_type and fixed_type are both None, maybe it's being assumed that one of these must exist (since one of them normally does).

[Mysteryem]

Some functions that take list/tuple/sequence arguments are also not being picked up correctly and are instead being set to the element type.
Examples:
normals argument of Mesh.normals_split_custom_set and Mesh.normals_split_custom_set_from_vertices
index argument of VertexGroup.add