Hvplot.save with fmt='scrubber' not rendering last step correctly

The following code produces a faulty html file where the last step shows the second to last entry instead of the last entry in the time series.

import xarray as xr
import hvplot.xarray  # noqa

air_ds = xr.tutorial.open_dataset('air_temperature').load()
air = air_ds.air
hvp=air.isel(time=slice(0,4)).hvplot(groupby='time', width=600)



What is expected in the html file is the 18:00:00 time step in the last step. Instead, the 12:00:00 step is repeated.

hvplot version 0.7.3
xr version 0.20.2

Seems like a bug; perhaps file a GitHub issue?

To get around it, you can build your own player with