import issue when using underworld

[NengLu]

Hi guys, I run into an import issue and that bother me a while, would you help me check with that? if import underworld and stripy together, it will somehow get the wrong tri.simplices:

import underworld
from stripy import cartesian_meshes
minX, maxX, minY, maxY, dx, dy = 0.0, 3.0 ,0.0, 1.0, 0.015625 ,0.015625
extent_xy = [minX, maxX, minY, maxY]
tri = cartesian_meshes.square_mesh(extent_xy, dx,dy, random_scale=0.0, refinement_levels=0)
tri.simplices

The result is:

TRMESH - Fatal error!
  The first 3 nodes are collinear.
  Try reordering the data.
array([], shape=(0, 3), dtype=int64)

While import stripy alone, the tri.simplices are correct as:

array([[    0, 12544, 11005],
       [    0, 11005,   193],
       [    1, 12543, 11470],
       ...,
       [12096, 12434, 12433],
       [12209, 12398, 12397],
       [12260, 12419, 12418]])

Are there any function conflicts there in underworld and stripy or? Thanks in advance.