clifford: array of multivectors fails

@rkern or @moble, do either of you know why this happens?

import numpy as np
from clifford import Cl 
layout,blades = Cl(2) # note i changed firstIdx=1 by default in Cl
locals().update(blades)

np.array([e1,e2],dtype=np.object) 

yields

array([[0, 1, 0, 0],
       [0, 0, 1, 0]], dtype=object)

perhaps there are some special array-like methods that Multivector implements? is there a way to have an array of multivectors, instead of an array of their values?