It seems like if the differences in the contour levels are too small, updating the plot breaks its colors.
Here’s a MWE to make things clearer.
using Plots x = -0.1:0.01:0.1 y = -0.1:0.01:0.1 z = [i^2+j^2 for i in x, j in y] cont = contourf(x, y, z) display(cont) vline!(cont, [0.0]) hline!(cont, [0.0]) display(cont)
Am I doing anything wrong here?