How to add annotations to a scatter3D plot using scene?

Plotly R, MATLAB, Julia, Net Plotly R
1

I am trying to add a text annotation to points in a scatter3d Plotly plot with a different scene. How can I make the annotation move around with the plot? Even when I set xref and yref as ‘scene’ the annotation doesn’t move.

This is a reproducible example I am trying to run:

library(plotly)

rep.ex = data.frame(x1=1:20, y1=1:20, z1=(1:20)*2, text1=letters[1:20])

axoff <- list(title = "", zeroline = FALSE, showline = FALSE, showticklabels = FALSE, showgrid = FALSE, autotick = F)
axoffxy <- list(title = "", zeroline = FALSE, showline = FALSE, showticklabels = FALSE, showgrid = FALSE, autotick = F, showspikes=F)


plot_ly(data=data.frame(rep.ex), x=rep.ex$x1, y=rep.ex$y1, z=rep.ex$z1, 
            marker=list(size=2.6), 
            color=rep.ex$x1, hoverinfo='text',
            text=rep.ex$text1,
            type="scatter3d", mode = "markers") %>%
  layout(showlegend = T, dragmode="turntable", scene = list(aspectmode='cube', xaxis = axoffxy, yaxis = axoffxy, zaxis = axoff), 
         annotations=list(showarrow=FALSE, 
                          text='Here I insert my annotation',  
                          xref='scene',     
                          yref='scene',
                          zref='scene',
                          x=1,  
                          y=1, 
                          z=2,
                          xanchor='left',   
                          yanchor='bottom',  
                          font=list(size=12 )))
2

@_kg Here https://plot.ly/r/text-and-annotations/ you find an example of 3d annotation.

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