Wrong display of FieldArray for MultiPiece datasets

Field arrays seems to not display correctly (it always stays grey) for a dataset with a vtkMultiPiece inside of it. The problem also occurs with the TimeValue array. Replacing the multipiece with a multiblock solves the problem.

Attached are the dataset I created for testing, following this archtiecture : datasets.zip

                MultiBlock
                /       \
       MultiPiece      MultiPiece
      /    |    \      /    |    \   
  Piece[1,2,3] ...    Piece[1,2,3] ...

If I attach a field array on each node and leafs they're not even detected (see absence of array MultiPiece Name in dataset multipiece_leavesAndNodes).

If I attach the field array only on the leafs it is detected, just displayed the wrong way. The color legend does detect the 2 values though (see screenshot below).