Plot does not show hoverinfo for first data point when default hovermode or set to 'closest'

As written in the title, the hoverinfo for the first (bottom left) data point when layout.hovermode= 'closest' or kept as default does not appear.

# call library
library(plotly)

# reset fig
fig <- NULL

# add an extra line to check behavior on right hand side of graph
cars_one_extra_line <- rbind(cars,c(25,90))

# plot
fig <- plot_ly(cars_one_extra_line)
fig <- fig %>% add_trace(x = ~speed, 
                         y = ~dist, 
                         color = ~dist,
                         colors = 'RdBu',
                         type = 'scatter',
                         mode = 'markers')
fig <- fig %>% layout(hovermode = "closest") 
fig

This is shown in the screenshot below. If the cursor is moved to the point above, the hoverinfo appears.

In an effort to understand the behavior, I also tried other tags. Strangely, the hovermode = 'y' also seems to have a weird behavior. Things to note are the following:

• text is tilted,
• text is sometimes obscured beyond the viewing frame (not shown in this example but does occur in certain cases),
• text is sometimes shown twice but in two places,
• y axis position is not always shown (for points at the top and bottom of the chart)

plot_ly、散布マーカー、および hovermode を "closest" または "y" に設定して、提供された R の再現コードを実行し、hover の欠落および不正な動作を確認します。R パッケージとそのインタラクティブなグラフ出力で使用される hover のレンダリングパスを追跡します。完了の条件は、最初の点に hoverinfo が表示され、報告されている hovermode のケースが、クリッピング、重複、軸位置の欠落なしに一貫してレンダリングされることです。