Monochrome Heatmap + plotly removes the heatmap color

Hello, I had previously described an issue I faced with heatmaply here: https://stackoverflow.com/questions/50976183/heatmaply-color-when-all-elements-are-the-same-value, and one of the answers pointed out the fact that this was a plotly bug, not a heatmaply bug.

Essentially, when a heatmap for a matrix where all the values are the same (so a monochrome heatmap) is passed to ggplotly, the resulting plotly plot removes the color and renders it all in gray.

library(ggplot2)
library(plotly)
#> 
#> Attaching package: 'plotly'
#> The following object is masked from 'package:ggplot2':
#> 
#>     last_plot
#> The following object is masked from 'package:stats':
#> 
#>     filter
#> The following object is masked from 'package:graphics':
#> 
#>     layout
library(viridis)
#> Loading required package: viridisLite
x <- rep(1, 10)
g <- ggplot(data.frame(x), aes(x=x, y=x, fill=x)) + 
    geom_tile() + 
    scale_fill_viridis(limits = c(0, 1))
g

Created on 2018-06-29 by the reprex package (v0.2.0.9000).

When ggplotly(g) is run, the output is as follows:

I tried attaching this to the reprex but could not, as reprex does not seem to play well with plotly objects, or I am missing something

As you can see, plotly removes the coloring in the heatmap. What is the problem here?

Bắt đầu bằng cách chạy ví dụ R được cung cấp với ggplot2 và plotly, so sánh heatmap có màu của ggplot với kết quả của ggplotly(g). Theo dõi hành vi chuyển đổi đối với một ma trận mà tất cả các giá trị đều giống hệt nhau; hoàn thành khi ggplotly giữ nguyên màu của heatmap thay vì hiển thị các ô ở màu xám.