[BUG] Issue with line rendering when selecting indices

[LukazTrisauskas]

Description of expected behavior and the observed behavior

This is my first time raising an issue on a public repo. So, if I make any mistakes, I apologise in advance.

The selected area in the plot gets disconnected from the entire plot line, the start of unselected line and end of unselected line joins together.

This happens, only when circle glyphs are added to the plot

Before

After

from bokeh.plotting import figure, output_file, show
from bokeh.models import ColumnDataSource, BoxSelectTool, ResetTool
import numpy as np

output_file("example.html")

sample_data = np.random.rand(20)

source = ColumnDataSource(
    data=dict(x=np.arange(0, len(sample_data)), y=sample_data)
)
color_brewer = ["#31a354", "#addd8e"]

p = figure(width=1000, height=400, tools="box_select, reset", active_drag="box_select")
p.line(x='x', y='y', source=source, line_width=7, line_color=color_brewer[1])
p.circle(x='x', y='y', source=source, size=7, line_color=color_brewer[0], color=color_brewer[0])

show(p)

Screenshots or screencasts of the bug in action

[bryevdv]

@Lukas-Trisauskas thank you or the very detailed bug report

cc @bokeh/dev This seems to be a slight regression, given the screen capture animations in previous PR #6491 which show the "unselected" line being broken up and not "crossing" the selected points.

[LukazTrisauskas]

@mattpap Thank you! Is the fix now included in the final package. I already upgraded bokeh to 2.4.0 and the problem still persists.

[mattpap]

You will have to wait for bokeh 2.4.1, which, I think, we will schedule soon.

[LukazTrisauskas]

You will have to wait for bokeh 2.4.1, which, I think, we will schedule soon.

@mattpap That's great. Thank you!!