animation_button(visible=FALSE) meddles with trace names

[stvrd]

First of all: Congratulations for this magnificient package!
I am using the r package plotly and came across the following bug:

Naming traces works usually very well. When I remove the animation_button (which should be removed by default, imho) the names of traces in the legend disappear.

Here is a reproducible example:

data.frame(year = rep(2011:2020,each=10),
           t = 1:100,
           a = runif(100),
           b = rnorm(100),
           c = rexp(100)) %>% 
  plot_ly(x = ~t,
          frame = ~year) %>% 
  add_lines(y = ~a, name = 'uniform') %>% 
  add_lines(y = ~b, name = 'normal') %>% 
  animation_button(visible=FALSE)