issue_comments: 1236356402

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https://github.com/pydata/xarray/issues/2835#issuecomment-1236356402 https://api.github.com/repos/pydata/xarray/issues/2835 1236356402 IC_kwDOAMm_X85JsU0y 43316012 2022-09-04T14:41:39Z 2022-09-04T14:41:39Z COLLABORATOR

Cannot reproduce on current master using ```python import xarray as xr

ds = xr.Dataset({"a": (["x"], [1, 2, 3])}, attrs={"t": 1}) ds2 = ds.copy(deep=True) ds.attrs["t"] = 5 print(ds2.attrs) # returns: {'t': 1} ```

 
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