Panel notebook app in JHub Apps: callbacks fire, but pn.bind output does not re-render in deployed environment

[MUvaage]

I am seeing a deployment-only issue with Panel notebook apps in JHub Apps (Nebari). I have a brand new deployment in Azure Kubernetes service, limited amount of environments created in conda store.

In development, the app works as expected when running cells/using preview with notebook. In deployed JHub Apps, callbacks clearly fire, but bound output does not update correctly.

Observed behavior:

• Radio button value changes are received by Python callback (verified via in-app callback log).
• Existing object mutation works (a Markdown pane updates each click).
• Bound output replacement does not re-render as expected.
• I also added probes (text-only bind, widget-only bind, mixed bind) and interactivity still appears effectively stuck.

Expected behavior:

• pn.bind outputs should update on each selection, same as local.

Current deployed runtime (from in-app diagnostics):

• Python 3.11.15
• panel 1.8.9
• bokeh 3.8.2
• panel-material-ui 0.8.1
• jhsingle-native-proxy 0.8.3
• jupyter_bokeh 4.0.5
• pyviz_comms 3.0.6
• ipywidgets 8.1.8
• ipywidgets_bokeh 1.7.0
• tornado 6.5.3
• all from conda-forge

Notes:

• Websocket is connected.
• No obvious browser error.

Requested guidance:

• Is this a known limitation/bug in JHub Apps + Panel notebook serving?
• Are there recommended server/proxy settings for this case?
• Is there a preferred deployment pattern for notebook-based Panel apps to avoid this behavior?
• Would it make more sense to raise this issue in the Jhubapps repo?

App after clicking radio button:

Notebook:
Interact_test.ipynb