Lineplot incorrectly attempts sort my already sorted data

Whenever I try to lineplot my DataFrame, seaborn decides by default that it gets to decide that it isn’t sorted, plotting my data from left to right instead of start to finish, the way it is indexed, leading to weird zig zags in otherwise smooth data.

Why is sort=True enabled by default? DataFrames are indexed by very design, trying to guess what I’m using as my index defeats the purpose of even indexing my DataFrame

[AlLongley]

Could you explain what you mean by Y as a function of X? That would imply Y being dependent, the documentation depicts an example of what I’m trying to do as a sequential list of independent co-ordinates

x, y = np.random.randn(2, 5000).cumsum(axis=1)
ax = sns.lineplot(x=x, y=y, sort=False, lw=1)

[zoe1337]

I’m facing the same issue. sort=False has no effect, using Seaborn 0.12.0