Surface plots have extra artifacts on macOS/GR 0.73

[penelopeysm]

Hello! The following surface plot (found in the Plots.jl test suite, the same one as in #507) has some spiky artifacts when run with GR 0.73 on macOS.

Other operating systems are fine.

Git bisect says that this began with the commit d391790. Given that this isn't really a change to the Julia codebase, is this something that should be reported even further upstream?

Code

using Plots

xs = collect(0.1:0.05:2.0)
ys = collect(0.2:0.1:2.0)

X = [x for x ∈ xs for _ ∈ ys]
Y = [y for _ ∈ xs for y ∈ ys]

Z = (x, y) -> 1 / x + y * x^2

surface(
    X,
    Y,
    Z.(X, Y),
    xlabel = "longer xlabel",
    ylabel = "longer ylabel",
    zlabel = "longer zlabel",
)

Expected

Actual