Bin breaks are chosen awkwardly for stat_density_2d

[tjebo]

This is a follow up from #4003 - I was asked to open a new issue, which I will do -

by exactly quoting @clauswilke :)

There seems to be a problem where the breaks are chosen awkwardly for stat_density_2d()

See below, reprex with thanks copied from Claus !

library(ggplot2)

ggplot() + 
  geom_contour_filled(data = faithfuld, aes(waiting, eruptions, z = density), bins = 3, alpha = 0.5) +
  stat_density_2d(data = faithful, aes(waiting, eruptions), bins = 3, color = "black", size = 1)

ggplot() + 
  geom_density_2d_filled(data = faithful, aes(waiting, eruptions), bins = 3, alpha = 0.5) +
  geom_density_2d(data = faithful, aes(waiting, eruptions), bins = 3, color = "black", size = 1)

^{Created on 2020-05-15 by the reprex package (v0.3.0)}

Session info

devtools::session_info()
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[tjebo]

And because I hardly get a chance to do that - everyone here in this awesome ggplot development team, thanks so much for your work !!!