geom_dotplot negates free y scale from facet_wrap

[aosmith16]

When binning the dotplot on the y axis, the facet_wrap free y scale is negated. This is new behavior - is it by design?

library(ggplot2)

p1 = ggplot(mtcars, aes(factor(cyl), mpg)) +
    geom_boxplot() +
    facet_wrap(~am, scales = "free_y")
p1

p1 + geom_dotplot(binaxis = "y")

[has2k1]

This is probably due to the removal of stat_dotplot. Now the binning is happening across the entire layer i.e in setup_data instead of happening per panel.

edit: My recollection was off when I tried to make sense of this initially. I have fixed the issue in PR #1622.