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Bug: leftover xaxis entries when toggling between buttons

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
55/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Active
Tech stack
python

Research direction

Start by running the provided Python MWE and switching between the option1 and option2 buttons in the subplot figure. Inspect how shared x-axis entries are retained when traces are hidden and the options share the label B. Done means switching to option2 no longer displays the leftover C x-axis entry from option1.

Written by the indexing model from the issue text.

Description

Minimum Working Example (MWE):

import plotly.graph_objects as go
from plotly.subplots import make_subplots

# Data
option1_x = ['A', 'B', 'C']
option1_y1 = [1, 3, 2]
option1_y2 = [2, 4, 3]

option2_x = ['B', 'D', 'E']
option2_y1 = [2, 1, 4]
option2_y2 = [3, 2, 5]

# Create subplots
fig = make_subplots(rows=2, cols=1, shared_xaxes=True, subplot_titles=("y1", "y2"))

# Add traces for option1
fig.add_trace(go.Bar(x=option1_x, y=option1_y1, name="option1_y1"), row=1, col=1)
fig.add_trace(go.Bar(x=option1_x, y=option1_y2, name="option1_y2"), row=2, col=1)

# Add traces for option2
fig.add_trace(go.Bar(x=option2_x, y=option2_y1, name="option2_y1"), row=1, col=1)
fig.add_trace(go.Bar(x=option2_x, y=option2_y2, name="option2_y2"), row=2, col=1)

# Initially set option1 visible and option2 invisible
for trace in fig.data:
    trace.visible = False
fig.data[0].visible = True  # y1 option1
fig.data[1].visible = True  # y2 option1

# Add buttons
fig.update_layout(
    updatemenus=[
        {
            "type": "buttons",
            "buttons": [
                {
                    "label": "option1",
                    "method": "update",
                    "args": [
                        {"visible": [True, True, False, False]},  # Show only option1 traces
                    ]
                },
                {
                    "label": "option2",
                    "method": "update",
                    "args": [
                        {"visible": [False, False, True, True]},  # Show only option2 traces
                    ]
                }
            ],
            "showactive": True,
        }
    ],
)

fig.show()

Image

Toggling to option2, we can see the C xaxis entry (from option1) still showing (even with no data for it):

Image

This seems to only be an issue with subplots, and when the traces of different options have some xaxis labels in common (in this case B).

Dominant language
Python
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Avg merge
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Merged PRs (30d)
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