Scalebar text removed when plot included in Layout

[droumis]

ALL software version info

Software Version Info

Python              :  3.12.4 | packaged by conda-forge | (main, Jun 17 2024, 10:13:44) [Clang 16.0.6 ]
Operating system    :  macOS-13.5.2-arm64-arm-64bit
Panel comms         :  default

holoviews           :  1.20.0

bokeh               :  3.6.1
colorcet            :  3.1.0
cudf                :  -
cupy                :  -
dask                :  2024.7.1
dask-expr           :  1.1.9
datashader          :  0.16.3
geoviews            :  -
hvplot              :  0.10.0
ibis-framework      :  -
IPython             :  8.26.0
ipywidgets-bokeh    :  -
jupyter-bokeh       :  -
jupyterlab          :  4.2.4
matplotlib          :  3.9.1
networkx            :  -
notebook            :  -
numba               :  0.60.0
numpy               :  2.0.0
pandas              :  2.2.2
panel               :  1.5.3
param               :  2.1.1
pillow              :  10.4.0
plotly              :  -
pyarrow             :  16.1.0
pyviz-comms         :  3.0.2
scikit-image        :  -
scipy               :  1.14.0
spatialpandas       :  -
streamz             :  -
tsdownsample        :  -
xarray              :  2024.6.0

Description of expected behavior and the observed behavior

Scalebar text removed when plot included in Layout

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

import holoviews as hv
hv.extension('bokeh')
curve = hv.Curve([1,2]).opts(scalebar=True)
curve

curve + hv.Curve([2,1])

Stack traceback and/or browser JavaScript console output

Screenshots or screencasts of the bug in action

• I may be interested in making a pull request to address this

[hoxbro]

I think this and #6448 are problem in Bokeh (or a setting that we are not setting correctly).

A pure Bokeh example:

import numpy as np
from bokeh.layouts import column, row, gridplot
from bokeh.models import ColumnDataSource, Metric, RangeTool, ScaleBar
from bokeh.plotting import figure, show

n_points = 3000
x_values = np.linspace(0, 100, n_points)
y_values = np.random.randn(n_points).cumsum()


def plot(width, height, location="right"):
    source = ColumnDataSource(data=dict(x=x_values, y=y_values))

    p = figure(width=width, height=height)
    p.line("x", "y", source=source)
    p.toolbar_location = location

    scale_bar = ScaleBar(
        range=p.x_range, orientation="horizontal", location="bottom_right"
    )
    p.add_layout(scale_bar)
    return p

lay = row(plot(300, 300),  plot(800, 300))
show(lay)

lay = gridplot(children=[[plot(300, 300, "above"), plot(300, 300, "above")]])
show(lay)

@mattpap, any thoughts?

[mattpap]

It seems completely broken. I'm investigating.

[mattpap]

Fixed and will be a part of bokeh 3.6.2.