websocket flooded with ~20 events per second

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ALL software version info

panel 0.13.1
holoviews 1.15.0
python 3.7.12

ubuntu 22.04 LTS using Firefox 102.0.1
(also see it on macOS Monterey 12.4 as host using Safari v15.5)

Installed in a new conda env:
conda install -c pyviz holoviews bokeh panel

Description of expected behavior and the observed behavior

Expected: Run from 'panel serve' with --autoreload flag, updates on changes to source file and user interaction via websocket.

Observed: Websocket is getting multiple messages, approx 20/sec, with no file changes or user interaction on the application. If I don't use --autoreload the messages are as expected.

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

Vanilla template code from panel website

import panel as pn
import numpy as np
import holoviews as hv

pn.extension(sizing_mode = 'stretch_width')

vanilla = pn.template.VanillaTemplate(title='Vanilla Template')

xs = np.linspace(0, np.pi)
freq = pn.widgets.FloatSlider(name="Frequencyb", start=0, end=10, value=2)
phase = pn.widgets.FloatSlider(name="Phase", start=0, end=np.pi)

@pn.depends(freq=freq, phase=phase)
def sine(freq, phase):
    return hv.Curve((xs, np.sin(xs*freq+phase))).opts(
        responsive=True, min_height=400)

@pn.depends(freq=freq, phase=phase)
def cosine(freq, phase):
    return hv.Curve((xs, np.cos(xs*freq+phase))).opts(
        responsive=True, min_height=400)

vanilla.sidebar.append(freq)
vanilla.sidebar.append(phase)

vanilla.main.append(
    pn.Row(
        pn.Card(hv.DynamicMap(sine), title='Sine'),
        pn.Card(hv.DynamicMap(cosine), title='Cosine')
    )
)
vanilla.servable();

$ panel serve --autoreload vanilla.py

Stack traceback and/or browser JavaScript console output

Screenshots or screencasts of the bug in action

Screencast from 08-31-2022 04:55:36 PM.webm


Screencast from 08-31-2022 04:55:36 PM.webm