issues: 966669714

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
966669714 MDU6SXNzdWU5NjY2Njk3MTQ= 5691 MultiIndex coordinates loc/sel not working in 0.19.0 13747844 closed 0     2 2021-08-11T13:00:19Z 2022-03-17T17:11:42Z 2022-03-17T17:11:42Z NONE      

What happened: TypeError: unhashable type: 'numpy.ndarray'

What you expected to happen: No error

Minimal Complete Verifiable Example: Take this for example: python import numpy as np import pandas as pd import xarray as xr midx = pd.MultiIndex.from_arrays([["R", "R", "V", "V"], [0.1, 0.2, 0.7, 0.9]], names=("band", "wn")) mda = xr.DataArray(np.random.rand(4), coords={"spec": midx}, dims="spec") mda.loc[{'band': 'R', 'wn': 0.1}]

Environment:

xarray: 0.19.0, pandas: 1.3.1, numpy: 1.21.1, 
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   completed 13221727 issue

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