Bug: leftover xaxis entries when toggling between buttons

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()

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

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).

Inizia eseguendo il MWE Python fornito e alternando tra i pulsanti option1 e option2 nella figura dei subplot. Esamina come vengono mantenute le voci condivise dell’asse x quando le traces sono nascoste e le opzioni condividono l’etichetta B. Il lavoro è completato quando passando a option2 non viene più visualizzata la voce C dell’asse x rimasta da option1.