stat_bin2d error with text geom when using transformed scales

[beansprout88]

I am encountering an issue with label placement with the stat_bin2d function when using a transformed axis such as log or sqrt. Essentially the labels are misplaced or missing in the latter case, as shown below

This gives a correct placement of labels showing the number of data points in each quadrant:

df <- data.frame(rnorm(1000) + 5, rnorm(1000) + 5)
colnames(df) <- c('x', 'y')

ggplot(df) +
  aes(x = x, y = y) +
  geom_point() +
  geom_vline(xintercept = 5) + geom_hline(yintercept = 5) +
  stat_bin2d(geom = 'label', 
             aes(label = ..count..), 
             breaks = list(x = c(1, 5, 20), y = c(1, 5, 20)), 
             fill = 'white')

However the addition of scale_x_log10() causes all of the labels to be lost. Depending on the exact axes, sometimes only some labels are lost. The numbers may also change indicating that the bins are incorrect.