[BUG]: Unexpected display of Scattergl with more than 40 subplots

[simon-mazenoux]

Description

I am observing weird display behavior with Scattergl subplots

Screenshots/Video

Normal behavior (up to 40 subplots):|

Starting 41 subplots:

Steps to reproduce

On Firefox 150.0, Ubuntu 24.04, Wayland, with plotly 6.7.0:

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

rows = 50
fig = make_subplots(rows=rows)
fig.update_layout(height=rows * 100)
for row in range(1, rows + 1):
    fig.add_trace(go.Scattergl(x=[0,1], y=[0,1]), row=row, col=1)

html = fig.to_html()
with open("scattergl.html", "w") as f:
    f.write(html)
print("Scattergl plot saved to scattergl.html")

Notes

I also tested with 6.1.0, and the threshold there is 50 instead of 41.