wrong slice when try to divide data by xarray

[jesieleo]

these two should equals ,but not , latitude was wrong

#wrong code
> np.array(data1.sel(time='1990-1' , isobaricInhPa=200 ).z[: , ::-10 , ::10])
Out[37]: 
array([[[109890.25, 109890.75, 109890.75, ..., 109888.25, 109889.25,
109889.75],
[110014.75, 110017.75, 110020.75, ..., 110006.75, 110009.75,
110012.25],
[110109.75, 110115.25, 110119.75, ..., 110098.25, 110101.75,
110106.25],
...,
[107800.25, 107824.75, 107845.75, ..., 107719.75, 107747.25,
107775.25],
[107684.25, 107697.75, 107709.75, ..., 107641.25, 107656.25,
107670.25],
[107585.75, 107587.75, 107589.75, ..., 107578.75, 107581.25,
107583.25]]], dtype=float32)

#right code
> np.array( data1.sel(time='1990-1' , isobaricInhPa=200 ).z)[: , ::-10 , ::10]
Out[38]: 
array([[[109798.75, 109798.75, 109798.75, ..., 109798.75, 109798.75,
         109798.75],
        [109915.75, 109916.75, 109917.25, ..., 109912.75, 109914.25,
         109915.25],
        [110037.75, 110040.25, 110043.75, ..., 110028.25, 110030.25,
         110034.25],
        ...,
        [107776.25, 107797.25, 107818.75, ..., 107702.75, 107727.25,
         107753.25],
        [107662.25, 107673.25, 107683.25, ..., 107626.75, 107638.75,
         107650.75],
        [107571.25, 107571.25, 107571.25, ..., 107571.25, 107571.25,
         107571.25]]], dtype=float32)

The latitude is really messed up.
test1111111.zip