BUG: Ensight format for sampling with tensor

when sampling the surface and all fields are aimed to be sampled onto the surface, tensor is an issue when using ensight format.

--> FOAM FATAL IO ERROR: (openfoam-2306)
Entry 'type' has 1 excess tokens in stream

    2(tensor asym)

file: fields.grad(U) at line 67.

Reproducible by adding caching of grad(U) and sampling.