DiscreteSlider doesn't update properly when watching

[Adam-D-Lewis]

ALL software version info

panel 0.10.2 and see screenshot below for jupyter versions

Description of expected behavior and the observed behavior

I would expect the label above the discrete slider to update when the value is changed in the code (discrete_slider = 2), but instead it remains 32. The markdown updates correctly.

Complete, minimal, self-contained example code that reproduces the issue

import panel as pn
pn.extension()

discrete_slider = pn.widgets.DiscreteSlider(name='Discrete Slider', options=[2, 4, 8, 16, 32, 64, 128], value=32)
slider_val_markdown = pn.pane.Markdown(str(discrete_slider.value))

layout = pn.Column(discrete_slider, slider_val_markdown)

def update(event):
    layout.__setitem__(1, str(discrete_slider.value))

discrete_slider.param.watch(update, 'value')

discrete_slider.value = 2

layout

Screenshots or screencasts of the bug in action