Nightly Xarray backends tests failed

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Python 3.14 Test Summary

::TestIcechunkStoreFilesystem::test_roundtrip_numpy_datetime_data[3]: AssertionError: Left and right Dataset objects are not identical
Differing indexes:
L   t                    DatetimeIndex(['2000-01-01', '2000-01-02', 'NaT'], dtype='datetime64[us]', name='t', freq=None)
R   t                    DatetimeIndex(['2000-01-01', '2000-01-02', 'NaT'], dtype='datetime64[ns]', name='t', freq=None)
::TestIcechunkStoreMemory::test_roundtrip_numpy_datetime_data[3]: AssertionError: Left and right Dataset objects are not identical
Differing indexes:
L   t                    DatetimeIndex(['2000-01-01', '2000-01-02', 'NaT'], dtype='datetime64[us]', name='t', freq=None)
R   t                    DatetimeIndex(['2000-01-01', '2000-01-02', 'NaT'], dtype='datetime64[ns]', name='t', freq=None)
::TestIcechunkStoreMinio::test_roundtrip_numpy_datetime_data[3]: AssertionError: Left and right Dataset objects are not identical
Differing indexes:
L   t                    DatetimeIndex(['2000-01-01', '2000-01-02', 'NaT'], dtype='datetime64[us]', name='t', freq=None)
R   t                    DatetimeIndex(['2000-01-01', '2000-01-02', 'NaT'], dtype='datetime64[ns]', name='t', freq=None)

[ianhi]

😠 I thought this was fixed already. I'll look into this tomorrow