Where do the limit breaks for the legend guides and y-axis labels for polar coordinates get removed in ggplot2 by default?

edit

In ggplot2, the limit breaks for the legend guides and y-axis labels for polar coordinates get removed when the plot is created using the coord_polar() function. When polar coordinates are used, the y-axis is transformed into an angle axis, and the legend guides and y-axis labels are no longer applicable. Therefore, ggplot2 removes them by default to avoid confusion in the plot.