MPSTrainingHelloWorld aborts with error, solution?

In case I am increasing the batch size in Controls.h to a number larger than 64 (e.g. 80) the app stops with an error:

validateComputeFunctionArguments:882: failed assertion `Compute Function(cnnConvArray_32x32_64): incorrect type of texture (MTLTextureType2DArray) bound at texture binding at index 16 (expect MTLTextureType2D) for Adest[16].'


I have no clue what this error wants to tell me. Does anybody have any clues?