Attribute 'flags' error on plotting xarray data using hvplot

[hdsingh]

The following code gives AttributeError("'Array' object has no attribute 'flags'") :

import hvplot.xarray

grib_thredds_da = xr.open_dataset("http://thredds.ucar.edu/thredds/dodsC/grib/FNMOC/WW3/Global_1p0deg/Best", chunks={})
var = 'wnd_wav_per_surface'
time_dim = grib_thredds_da[var].dims[0]

grib_thredds_da[var].hvplot(x='lon', y='lat', groupby=time_dim, rasterize=True)

We are able to perform all other operations on it using xarray such as:

grib_thredds_da[var].groupby(time_dim).mean()

but using hvplot results in error.
This conda environment has been used.

The same error has been reproduced in hdsingh/Dashboards#1 first three notebooks. Its traceback is also available in this issue.

@philippjfr @martindurant Please help me figure this out.

[hdsingh]

@philippjfr Thank you !!