NdOverlay graph colors disappear for "show_legend=False" for Scatter graphs.

[BMM3]

ALL software version info

holoviews: 1.18.3
pandas: 2.2.1
bokeh: 3.4.0

Description of expected behavior and the observed behavior

An NdOverlay with a different color for each Scatter graph only gives the color to the Scatter graph when the legend is present. When the legend is not shown (show_legend=False), the colors are the same for all the graphs.

Notice: for the Curve graphs this is working as expected.

Notice: when the "show_legend" is disabled at the "Scatter" level it is working as expected.

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

import holoviews as hv

# The first NdOverlay with multiple Curves does work as expected
plot1_curve = hv.Curve([1, 2, 3]).opts(color='blue')
plot2_curve = hv.Curve([1, 4, 9]).opts(color='red')

ndoverlay_curve = hv.NdOverlay({0: plot1_curve, 1: plot2_curve}, 'Plot')
ndoverlay_curve.opts(show_legend=False)

# The second NdOverlay with multiple Scatters does NOT work as expected
plot1_scatter = hv.Scatter([1, 2, 3]).opts(color='blue')
plot2_scatter = hv.Scatter([1, 4, 9]).opts(color='red')

ndoverlay_scatter = hv.NdOverlay({0: plot1_scatter, 1: plot2_scatter}, 'Plot')
ndoverlay_scatter.opts(show_legend=False)

# The third NdOverlay with multiple Scatters where the show_legend option is disabled at the Scatter level does again work as 
 expected.
ndoverlay_scatter_2 = hv.NdOverlay({0: plot1_scatter, 1: plot2_scatter}, 'Plot')
ndoverlay_scatter_2.opts(hv.opts.Scatter(show_legend=False))

Screenshots or screencasts of the bug in action