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
1409811164,I_kwDOAMm_X85UCALc,7162,copy of custom index does not align with original,2448579,closed,0,,,7,2022-10-14T20:17:22Z,2023-03-24T20:37:13Z,2023-03-24T20:37:12Z,MEMBER,,,,"### What happened?

MY prototype CRSIndex is broken on the release version: https://github.com/dcherian/crsindex/blob/main/crsindex.ipynb under heading ""BROKEN: Successfully align with a copy of itself""

The cell's code is : 
```
copy = newds.copy(deep=True)
xr.align(copy, newds)
```

which should always work.

@headtr1ck is https://github.com/pydata/xarray/pull/7140 to blame?


### Environment

<details>
INSTALLED VERSIONS
------------------
commit: None
python: 3.10.6 | packaged by conda-forge | (main, Aug 22 2022, 20:43:44) [Clang 13.0.1 ]
python-bits: 64
OS: Darwin
OS-release: 21.6.0
machine: x86_64
processor: i386
byteorder: little
LC_ALL: None
LANG: en_US.UTF-8
LOCALE: ('en_US', 'UTF-8')
libhdf5: 1.12.2
libnetcdf: 4.8.1

xarray: 2022.10.0
pandas: 1.5.0
numpy: 1.23.3
scipy: 1.9.1
netCDF4: 1.6.0
pydap: None
h5netcdf: 1.0.2
h5py: 3.7.0
Nio: None
zarr: 2.13.3
cftime: 1.6.2
nc_time_axis: 1.4.1
PseudoNetCDF: 3.2.2
rasterio: 1.3.2
cfgrib: 0.9.10.2
iris: 3.3.1
bottleneck: 1.3.5
dask: 2022.9.2
distributed: 2022.9.2
matplotlib: 3.6.1
cartopy: 0.21.0
seaborn: 0.12.0
numbagg: 0.2.1
fsspec: 2022.8.2
cupy: None
pint: 0.19.2
sparse: 0.13.0
flox: 0.6.0
numpy_groupies: 0.9.19
setuptools: 65.5.0
pip: 22.2.2
conda: None
pytest: 7.1.3
IPython: 8.5.0
sphinx: None

</details>
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