basemap_terra() low resolution / pixilated

[thomarse-ef]

I'm trying to use the basemap_terra() function but the image is coming out pixilated. Example:

library(terra)
library(basemaps)

# load data
data(ext)

# view
basemap_magick(ext)
basemap(ext)
## these look great

# plot terra version
plot(basemap_terra(ext))
# pixilated

I've tried playing with arguments map_res and dpi but no joy. Any ideas?