ggplotly + subplot(shareX=TRUE) causes date axis tick labels to disappear after zoom/pan

Description

When combining two ggplotly() objects using subplot(..., shareX = TRUE), x-axis tick labels disappear after zooming/panning.

This happens specifically with date-time x axes.

The hover labels still show correct datetime values, but axis ticks disappear.

Reproducible example

library(tidyverse)
library(lubridate)
library(plotly)
library(viridisLite)

d = tibble(
  time = seq(
    ymd_hms("2019-01-01 00:00:00"),
    by = "10 sec",
    length = 1e5
  ),
  y = cumsum(rnorm(1e5))
)

d2 = expand.grid(
  date = unique(date(d$time)),
  y = 48 / 2^8 * 2^(seq(
    0,
    log2(48 / (48 / 2^8)),
    by = 1/20
  ))
) %>%
  as_tibble() %>%
  mutate(z = rnorm(n()))

g1 = ggplot(d, aes(time, y)) +
  geom_line(linewidth = 0.3) +
  theme_bw()

g2 = ggplot(
  d2 %>%
    mutate(date = as.POSIXct(date) + 12*3600),
  aes(date, log2(y), fill = z)
) +
  geom_raster() +
  scale_fill_gradientn(colours = turbo(100)) +
  theme_bw()

p1 = ggplotly(g1)
p2 = ggplotly(g2)

subplot(
  p1,
  p2,
  nrows = 2,
  shareX = TRUE
) %>%
  layout(
    dragmode = "pan"
  )

Expected behavior

x-axis tick labels should remain visible and automatically update during zoom/pan.

Actual behavior

x-axis tick labels disappear after zooming/panning.

Session info

sessionInfo()

ggplotly()、subplot()、shareX = TRUE、パン/ズーム操作を使った再現可能な R の例から始めます。ズームまたはパンの前後で日時軸の動作を比較します。x 軸の目盛りラベルが表示されたまま自動的に更新されれば完了です。