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
620134014,MDU6SXNzdWU2MjAxMzQwMTQ=,4073,Error in DataArray.from_dict(data_array.to_dict()) when using pd.MultiIndex,13747844,open,0,,,4,2020-05-18T11:32:19Z,2022-06-22T16:12:34Z,,NONE,,,,"<!-- A short summary of the issue, if appropriate -->
Error recovering DataArray with `from_dict` from what was persisted by `to_dict` when using `pandas.MultiIndex`.

#### MCVE Code Sample
<!-- In order for the maintainers to efficiently understand and prioritize issues, we ask you post a ""Minimal, Complete and Verifiable Example"" (MCVE): http://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports -->

```python
import pandas as pd
import xarray as xr
idx = pd.MultiIndex.from_arrays([[1, 2], [3, 4]], names=('one', 'two'))
array = xr.DataArray([0, 1], dims='idx', coords={'idx': idx})
assert array.sel(one=1, two=3) == 0
assert array.sel(one=2, two=4) == 1
array_dict = array.to_dict()
xr.DataArray.from_dict(array_dict)
```

#### Expected Output
No error.

#### Problem Description
<!-- this should explain why the current behavior is a problem and why the expected output is a better solution -->
`ValueError: Could not convert tuple of form (dims, data[, attrs, encoding]): (('idx',), [(1, 3), (2, 4)], {}) to Variable.`

#### Versions
python: 3.7.6
xarray: 0.15.1
pandas: 1.0.3
numpy: 1.18.4
scipy: 1.4.1
</details>
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