First tab's HoloMap slider is unresponsive

[ahuang11]

panel=0.7.0
bokeh=1.4.0
holoviews=1.12.6

I'm trying to dump two HoloMaps into separate tabs. Each of these HoloMaps have two or more sliders. When I try to put them into tabs, the slider in the first tab is unresponsive while the second tab works as expected.

import xarray as xr
import hvplot.xarray
import panel as pn
import holoviews as hv
hv.extension('bokeh')
pn.extension()

ds = xr.tutorial.open_dataset('air_temperature').isel(time=slice(0, 15), lat=slice(0, 5), lon=slice(0, 5))
ds['airx2'] = ds['air'] ** 2

plot1 = ds.hvplot('time', 'air', groupby=['lon', 'lat'], dynamic=False)
plot2 = ds.hvplot('time', 'airx2', groupby=['lon', 'lat'], dynamic=False)

pn.Tabs(plot1, plot2).save('test.html', embed=True)

This only happens when there are two sliders or more; e.g. the following works

import xarray as xr
import hvplot.xarray
import panel as pn
import holoviews as hv
hv.extension('bokeh')
pn.extension()

ds = xr.tutorial.open_dataset('air_temperature').isel(time=slice(0, 15), lat=slice(0, 5), lon=slice(0, 5))
ds['airx2'] = ds['air'] ** 2

plot1 = ds.hvplot('lon', 'lat', z='air', dynamic=False)
plot2 = ds.hvplot('lon', 'lat', z='airx2', dynamic=False)

pn.Tabs(plot1, plot2).save('test.html', embed=True)