Theme element "legend.title" no longer works with element_textbox

[AngusMackenzie]

I recently updated ggplot and now using element_textbox / element_textbox_simple causes an error when applying it to the theme element "legend.title". Any solution is appreciated as this is how I title all my legends! Thanks

library(ggplot2)
#> Warning: package 'ggplot2' was built under R version 4.4.2
library(ggtext)

ggplot(data = mtcars, aes(x = disp, y = mpg, color = cyl)) + 
  geom_point(size = 4) +
  labs(color = "Engine<br>Cylinders") +
  theme(legend.title = element_textbox() )
#> Error in eval(substitute(expr), data, enclos = parent.frame()): object 'angle' not found

^{Created on 2024-12-13 with reprex v2.1.1}