free_y ignored with facet_grid('. ~ var'), but works with facet_grid('var ~ .') and facet_wrap()

[jdanbrown]

df = pd.DataFrame({'x': np.random.rand(100), 'y': np.random.rand(100)})
df['color'] = np.floor(df['y'] * 3).astype('str')

# Bad: free_y ignored
ggplot(df, aes('x', 'y', color='color')) + geom_point() + facet_grid('. ~ color', scales='free_y')

# Good
ggplot(df, aes('x', 'y', color='color')) + geom_point() + facet_grid('color ~ .', scales='free_y')

# Good
ggplot(df, aes('x', 'y', color='color')) + geom_point() + facet_wrap('color', scales='free_y')

[jdanbrown]

🎉 Thanks!