jdaviz: [BUG] Cubeviz: MIRI MRS Collapse Fails

// ---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/specutils/manipulation/extract_spectral_region.py:29, in _edge_value_to_pixel(edge_value, spectrum, order, side)
     28 if hasattr(spectrum.wcs, "spectral"):
---> 29     index = spectrum.wcs.spectral.world_to_pixel(edge_value)
     30 else:

File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/astropy/wcs/wcsapi/high_level_api.py:309, in HighLevelWCSMixin.world_to_pixel(self, *world_objects)
    307 def world_to_pixel(self, *world_objects):
--> 309     world_values = high_level_objects_to_values(*world_objects, low_level_wcs=self.low_level_wcs)
    311     # Finally we convert to pixel coordinates

File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/astropy/wcs/wcsapi/high_level_api.py:233, in high_level_objects_to_values(low_level_wcs, *world_objects)
    232 if callable(attr):
--> 233     world.append(attr(objects[key]))
    234 else:

File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/astropy/wcs/wcsapi/fitswcs.py:563, in FITSWCSAPIMixin._get_components_and_classes.<locals>.value_from_spectralcoord(spectralcoord)
    562 else:
--> 563     return spectralcoord.with_observer_stationary_relative_to(observer).to_value(**kwargs)

File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/astropy/units/decorators.py:304, in QuantityInput.__call__.<locals>.wrapper(*func_args, **func_kwargs)
    303 with add_enabled_equivalencies(self.equivalencies):
--> 304     return_ = wrapped_function(*func_args, **func_kwargs)
    306 # Return

File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/astropy/coordinates/spectral_coordinate.py:583, in SpectralCoord.with_observer_stationary_relative_to(self, frame, velocity, preserve_observer_frame)
    582 if self.observer is None or self.target is None:
--> 583     raise ValueError("This method can only be used if both observer "
    584                      "and target are defined on the SpectralCoord.")
    586 # Start off by extracting frame if a SkyCoord was passed in

ValueError: This method can only be used if both observer and target are defined on the SpectralCoord.

During handling of the above exception, another exception occurred:

ValueError                                Traceback (most recent call last)
File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/ipyvue/VueTemplateWidget.py:60, in Events._handle_event(self, _, content, buffers)
     58     getattr(self, "vue_" + event)(data, buffers)
     59 else:
---> 60     getattr(self, "vue_" + event)(data)

File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/jdaviz/configs/default/plugins/collapse/collapse.py:49, in Collapse.vue_collapse(self, *args, **kwargs)
     47 with warnings.catch_warnings():
     48     warnings.filterwarnings('ignore', message='No observer defined on WCS')
---> 49     spec = spectral_slab(cube, spec_min, spec_max)
     50     # Spatial-spatial image only.
     51     collapsed_spec = spec.collapse(self.selected_func.lower(), axis=-1).T  # Quantity

File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/specutils/manipulation/extract_spectral_region.py:233, in spectral_slab(spectrum, lower, upper)
    204 """
    205 Extract a slab from the input `~specutils.Spectrum1D`
    206 defined by the lower and upper bounds defined by the ``region``
   (...)
    229 
    230 """
    231 region = SpectralRegion(lower, upper)
--> 233 return extract_region(spectrum, region)

File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/specutils/manipulation/extract_spectral_region.py:149, in extract_region(spectrum, region, return_single_spectrum)
    147 extracted_spectrum = []
    148 for subregion in region._subregions:
--> 149     left_index, right_index = _subregion_to_edge_pixels(subregion, spectrum)
    151     # If both indices are out of bounds then return an empty spectrum
    152     if left_index == right_index:

File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/specutils/manipulation/extract_spectral_region.py:83, in _subregion_to_edge_pixels(subregion, spectrum)
     79 else:
     80     # Convert lower value to spectrum spectral_axis units
     81     left_reg_in_spec_unit = left_func(subregion).to(spectral_axis.unit,
     82                                                     u.spectral())
---> 83     left_index = _edge_value_to_pixel(left_reg_in_spec_unit, spectrum, order, "left")
     85 # Right/upper side of sub region
     86 if subregion[1].unit.is_equivalent(u.pix):

File ~/miniconda3/envs/mrsoptimal/lib/python3.8/site-packages/specutils/manipulation/extract_spectral_region.py:41, in _edge_value_to_pixel(edge_value, spectrum, order, side)
     38     return index
     40 except Exception as e:
---> 41     raise ValueError(f"Bound {edge_value}, could not be converted to pixel index"
     42                      f" using spectrum's WCS. Exception: {e}")

ValueError: Bound 4.890499866509344e-06 m, could not be converted to pixel index using spectrum's WCS. Exception: This method can only be used if both observer and target are defined on the SpectralCoord.