expandToMin initializes container with a negative width

[riseOverRun]

Using the following code:

Split(['#a', '#b'], {
sizes: [40,60],
minSize: [400, 500],
expandToMin: true
});

My #a will render with a width of calc(-4950% - 5px) and my #b will render with a width of calc(5050% - 5px). It isn't until I drag the gutter that the containers will snap to the correct width and function as expected.