html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/2511#issuecomment-932582053,https://api.github.com/repos/pydata/xarray/issues/2511,932582053,IC_kwDOAMm_X843lhKl,38116316,2021-10-01T21:18:53Z,2021-10-01T21:20:49Z,NONE,"Hello! First off thank you for all the hard work on xarray! Use it every day and love it :) 

I am also having issues indexing with dask arrays and get the following error. 

```
 Traceback (most recent call last):
  File ""~/phd-comps/scripts/sfire-pbl.py"", line 64, in <module>
    PBLH = height.isel(gradT2.argmax(dim=['interp_level']))
  File ""~/miniconda3/envs/cr/lib/python3.7/site-packages/xarray/core/dataarray.py"", line 1184, in isel
    indexers, drop=drop, missing_dims=missing_dims
  File ""~/miniconda3/envs/cr/lib/python3.7/site-packages/xarray/core/dataset.py"", line 2389, in _isel_fancy
    new_var = var.isel(indexers=var_indexers)
  File ""~/miniconda3/envs/cr/lib/python3.7/site-packages/xarray/core/variable.py"", line 1156, in isel
    return self[key]
  File ""~/miniconda3/envs/cr/lib/python3.7/site-packages/xarray/core/variable.py"", line 776, in __getitem__
    dims, indexer, new_order = self._broadcast_indexes(key)
  File ""~/miniconda3/envs/cr/lib/python3.7/site-packages/xarray/core/variable.py"", line 632, in _broadcast_indexes
    return self._broadcast_indexes_vectorized(key)
  File ""~/miniconda3/envs/cr/lib/python3.7/site-packages/xarray/core/variable.py"", line 761, in _broadcast_indexes_vectorized
    return out_dims, VectorizedIndexer(tuple(out_key)), new_order
  File ""~/miniconda3/envs/cr/lib/python3.7/site-packages/xarray/core/indexing.py"", line 323, in __init__
    f""unexpected indexer type for {type(self).__name__}: {k!r}""
TypeError: unexpected indexer type for VectorizedIndexer: dask.array<getitem, shape=(240, 399, 159), dtype=int64, chunksize=(60, 133, 53), chunktype=numpy.ndarray>

```
```
dask                      2021.9.1           pyhd8ed1ab_0    conda-forge
xarray                    0.19.0             pyhd8ed1ab_0    conda-forge
```

In order to get it to work, I first need to manually call compute to load to NumPy array before using argmax with isel. Not sure what info I can provide to help solve the issue please let me know and ill send whatever I can. 

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