Figure layout height computation when **X axis label** is added behave weirdly in MaterialTemplate

[xavArtley]

ALL software version info

Python 3.12.5
Panel Version: 1.8.7

Figure layout height computation when X axis label is added behave weirdly in MaterialTemplate
Sometimes it's ok, sometimes no...

import numpy as np
import panel as pn
from bokeh.plotting import figure
from bokeh.models import ColumnDataSource

pn.extension(design="material")


# Control widgets
button = pn.widgets.Button(name="Start streaming", button_type="success")

# Initial empty source to trigger the layout issue
source = ColumnDataSource(data={"x": [], "y": []})
p = figure(sizing_mode="stretch_both", title="Layout Issue MRE", x_axis_label="Frequency (kHz)", y_axis_label="Amplitude")
p.line(x="x", y="y", source=source, line_width=2)

x_val = 0
def update():
    global x_val
    new_x = np.arange(x_val, x_val + 10)
    new_y = np.random.randn(10)
    source.stream({"x": new_x, "y": new_y}, rollover=100)
    x_val += 10

cb = pn.state.add_periodic_callback(update, period=100, start=False)

def toggle_streaming(event=None):
    if cb.running:
        cb.stop()
        button.name = "Resume"
        button.button_type = "success"
    else:
        cb.start()
        button.name = "Stop"
        button.button_type = "danger"

button.on_click(toggle_streaming)

controls = pn.Column(
    "# Layout Bug MRE",
    "The figure starts empty. When streaming begins, the x axes often fail to display correctly within the MaterialTemplate.",
    button, width=300
)

template = pn.template.MaterialTemplate(title="Streaming Demo")
template.sidebar.extend(controls)
template.main.append(p)
template.servable()