Break points are not evenly spaced in two panels of scale_x_break()

[Aariq]

The break points where grid lines are drawn are not the same in the two panels of a plot with scale_x_break() and there is no way to set breaks manually because scale_x_break() doesn't pass arguments to scale_continuous and the breaks argument conflicts. Would something like scale_x_break(split = c(40, 80), breaks = list(c(10, 20, 30, 40), c(80, 90, 100))) maybe be possible? Or could the default behavior of scale = "fixed" to make sure the breakpoints are similarly spaced in all panels?