ipywidgets do not work inside templates

[peterlee18]

Windows 11
panel 1.2.2
ipywidgets 8.1.0
ipywidgets_bokeh 1.5.0
Microsoft Edge - Version 116.0.1938.62 (Official build) (64-bit)

ipywidgets work fine in basic components (simple_app) but not inside a template (app_screen). Also tried putting inside the main area and that doesn't work either.

import panel as pn
import ipywidgets as ipw

pn.extension("ipywidgets")

date = ipw.DatePicker(description="Date")
slider = ipw.FloatSlider(description="Float")

simple_app = pn.Column(
    pn.pane.Markdown("### Enter Date"),
    date,
    pn.pane.Markdown("### Enter Number"),
    slider,
)
simple_app.show()

app_screen = pn.template.BootstrapTemplate(
    title="Test Template",
    sidebar_width=350,
    sidebar=[
        pn.pane.Markdown("### Enter Date"),
        date,
        pn.pane.Markdown("### Enter Number"),
        slider,
    ],
)

app_screen.main.append(pn.Column("## TBA"))
app_screen.show()

The simple app gives:

app_screen gives:

[MarcSkovMadsen]

Can you share a screenshot of the browser console? It probably contains some logs with errors.

[peterlee18]

[peterlee18]

I actually discovered that the Vanilla template works fine so its seems that only certain templates are affected. I haven't done a systematic check of all the templates.