TypeError, string indices must be integers

[ghost]

TypeError: string indices must be integers
(1 additional frame(s) were not displayed)
...
  File "django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "cove_ofds/views.py", line 139, in explore_ofds
    process_data = task.process(process_data)
  File "cove_ofds/process.py", line 205, in process
    converter.process_data(nodes_data, spans_data)
  File "libcoveofds/geojson.py", line 217, in process_data
    self._process_network(geojson_feature)
  File "libcoveofds/geojson.py", line 232, in _process_network
    and "network" in geojson_feature_node_or_span["properties"]

[ghost]

Can't recreate and I looked at live data (which I obvs can't share here) and can't see anything that would cause this, so putting on hold