hovertemplate not rendering text for single items in the plot

When using hovertemplate in bar charts to annotate bars,
if the variable is present only once then text annotation doesn't work

For example in below image, Type B is only present once
and when hovered on it shows as "%{text}

but when using hoverinfo it seems to work fine

I need to use hovertemplate, as i had to use it in a function, where color and text options are passed as variable

any workaround to fix this?

Reproducible code example

library(data.table)
library(plotly)

data <- data.table(Date = c(rep(as.Date("2022-10-18"), 3),
                                rep(as.Date("2022-10-19"), 3),
                                rep(as.Date("2022-10-20"), 3)),
                       Type = c('A', 'B', 'C', 'A', 'D', 'C', 'C', 'D', 'A'),
                       Frequency = c(6, 3,  6, 10,  9,  9,  9,  3,  2))

# hovertemplate - Type B is only one entry and it shows as %{text}
plot_ly(data, x=~Date, y=~Frequency, color=~Type, type='bar', text=~Type,
        hovertemplate=paste('<b>%{text}</b>',
                            '<br><b>%{y}</b>',
                            '<br><b>%{x}</b>',
                            '<extra></extra>')) %>%
  layout(barmode="stack")

# hoverinfo - works as expected
plot_ly(data, x=~Date, y=~Frequency, color=~Type, type='bar',
        hoverinfo = 'text',
        text = ~paste('<b>', Type, '</b>',
                      '<br><b>', Date, '</b>',
                      '<br><b>', Frequency, '</b>')) %>%
  layout(barmode="stack")

issueの再現可能なR例を実行し、hovertemplateとhoverinfoの出力を比較します。単一のType Bバーに焦点を当ててください。Rパッケージで使用されるPlotlyのレンダリングパスを追跡します。hovertemplateがリテラルの%{text}ではなくType Bのテキストを表示すれば完了です。