Add refline in subplots is not work

📊 Plotly Python
,
1 
fig = make_subplots(rows=2, cols=1)
fig.add_hline(y=0, line_dash='solid', line_color='red', line_width=2, row=1, col=1)
fig.update_layout(width=600, height=400)
fig.show()

the result is:

image
image635×258 1.73 KB

plotly.py version : 6.4.0

2

If a reference line is added to a subplot that already has a trace, it can be work