When I run this locally this is working for me - the animation is working.
Do you have updated version of all the packages ?
---
title: "ReprexFlex"
output:
flexdashboard::flex_dashboard:
orientation: rows
vertical_layout: fill
source: embed
---
```{r setup, include=FALSE}
library(flexdashboard)
library(highcharter)
penguins <- palmerpenguins::penguins
```
Row
-----------------------------------------------------------------------
### Chart A
```{r}
hchart(penguins, "scatter", hcaes(x = flipper_length_mm, y = bill_length_mm, group = species)) %>%
hc_plotOptions(series = list(animation = F))
```
Row
-----------------------------------------------------------------------
### Chart B
```{r}
hchart(penguins, "scatter", hcaes(x = flipper_length_mm, y = bill_length_mm, group = species)) %>%
hc_plotOptions(series = list(animation = list(duration = 20000)))
```