earthkit.plot.barbs() unexpected error

[jeffbask7]

chart.barbs() produces error NumpySource' object has no attribute 'u_values'

import earthkit as ekt
import matplotlib.pyplot as plt
import cartopy.crs as ccrs
ds = ekt.data.from_source("ecmwf-open-data",
source='aws',
model='ifs',
param=["10u", "10v"],
step=[24],
)
crs = ccrs.PlateCarree()
domain_bounds = [-107,-89,32,50]
ds_xr = ds.to_xarray()
ds_xr = ds_xr.coarsen(latitude=4, longitude=4, boundary='trim').mean()
lon = ds_xr.longitude.values
lat = ds_xr.latitude.values
u10 = ds_xr['10u'].values
v10 = ds_xr['10v'].values

I can confirm the plot directly using matplotlib
fig, ax = plt.subplots(nrows=1, ncols=1, subplot_kw={'projection': crs})
ax.barbs(lon, lat, u10, v10)

However, error AttributeError: 'NumpySource' object has no attribute 'u_values' is encountered using earthkit,plots
chart = ekt.plots.Map(domain=domain_bounds, crs=crs)
chart.barbs(lon, lat, u10, v10)

Shouldn't the ekt.plots.barbs method also accept the arrays? Also, is it necessary to perform to_xarray() on the earthkit.data object for plots.barbs()?