Annotation text not sticking to hline object on secondary_y axis

[Maarten-vr]

I was working with the recently introduced horizontal lines (hline) objects and believe I encountered a small bug. When adding a horizontal line to the secondary axis, the position of the annotated text seems to stick to the first y axis still.

Working Example:

#Create Figure From Scratch
import numpy as np
from plotly.subplots import make_subplots
fig = make_subplots(specs=[[{"secondary_y": True}]], shared_xaxes=True)

# Add traces
serie_1 = [3000,3500,4000,3500,3000,3500]
serie_2 = [20,25,30,25,20,25]
fig.add_trace(go.Scatter(x=[1,2,3,4,5], y=serie_1, name='First Axis'), secondary_y=False)
fig.add_trace(go.Scatter(x=[1,2,3,4,5], y=serie_2, name='Second Axis'), secondary_y=True)

# Update X-Axis
fig.update_xaxes(nticks=5)

# Update First Y-Axis
fig.update_yaxes(title="First Axis",
                 nticks=7,
                 range=[0,5000],
                 secondary_y=False)

fig.add_hline(y=np.mean(serie_1),
              line_dash='dash', 
              line_color='blue', 
              annotation_text= 'average blue',
              annotation_position='top right', 
              annotation_font_color='blue')

# Update Secondary Y-Axis
fig.update_yaxes(title="Second Axis",
                 nticks=7,
                 range=[0,50],
                 secondary_y=True)

fig.add_hline(y=np.mean(serie_2),
              line_dash='dash', 
              line_color='red',
              annotation_text= 'average red',
              annotation_position='top right', 
              annotation_font_color='red',
              annotation_yref="y2", #not working?
              secondary_y=True)

Am I overlooking something or is this a small bug?

PS: Great addition by the way!

[fwhigh]

Seeing the same issue, thanks for reporting

[Jamesong7822]

I have the same issue as well!

[mariostrd]

Same here!

[Lundez]

+1, I've got the same issue

[MoritzBlumer]

Same issue here

[SorosBot]

It worked this way:

fig.add_hline(name='any name', y=50, yref='y2', line=dict(color='darkred', width=1, dash='dash'), annotation=dict( text="any text", yanchor="bottom", xanchor="right", font_color="darkred")

[gvwilson]

Hi - we are trying to tidy up the stale issues and PRs in Plotly's public repositories so that we can focus on things that are still important to our community. Since this one has been sitting for a while, I'm going to close it; if it is still a concern, please add a comment letting us know what recent version of our software you've checked it with so that I can reopen it and add it to our backlog. Alternatively, if it's a request for tech support, please post in our community forum. Thank you - @gvwilson