Barplot width not consistent across facets

[jamesahoward]

using Dates, DataFramesMeta, GLMakie, AlgebraOfGraphics

df = DataFrame(
    A = [1, 2, 3, 1],
    B = [1, 1, 1, 1],
    C = [1, 2, 3, 3]
)

spec = data(df) * mapping(:A, :B, row=:C) * visual(BarPlot)
draw(spec)

Issue can be resolved by manually setting the width argument within the layer definition.

spec = data(df) * mapping(:A, :B, row=:C) * visual(BarPlot, width=1)