stream widths are all 1 despite providing width columns

[aestrad-intera]

I am running the following code:

lines = sfrmaker.Lines.from_shapefile(shapefile=pshp_ws/streams,
id_column='StreamID',
routing_column='MEAN_toID',
name_column='NAME',
attr_length_units='meters', # units of source data
width1_column1='uwidth',
width2_column='dwidth',
width_units='feet'
)
sfrdata = lines.to_sfr(grid=mg, model=gwf, model_length_units='feet',
one_reach_per_cell=True)
rd = sfrdata.reach_data.copy()

all widths come out as 1 in rd. I have made sure that the columns in the shapefile provided exist. Why is this not returning a width column based on the supplied stream widths?