lineOverlap for two MultiLineStrings calculated incorrectly if there is some overlapping inside each MultiLineString

[theptyza]

jsfiddle:
http://jsfiddle.net/theptyza/w76tqdey/

Two MultiLineStrings have some overlapping in their components.

var multiLine1 = turf.multiLineString(
    [[[0,0],[0,1],[0,2],[0,3],[1,3],[2,3]],
    [[1,3],[2,3],[2,2],[1,2],[0,2],[0,1],[0,0]]]
);

var multiLine2 = turf.multiLineString(
    [[[0,0],[0,1],[0,2],[0,3],[1,3],[2,3],[2,2]],
    [[2,3],[2,2],[1,2],[0,2],[0,1],[0,0]]]
);

In multiLine1 both lines share the [[1,3],[2,3]] part.
In multiLine2 both lines share the [[2,3],[2,2]] part.

These two multilines overlap completely, but overlap is displayed like this (multiLine1 in blue, multiLine2 in green, overlap in red):

If I remove the shared parts in multilines the overlap is displayed correctly
http://jsfiddle.net/theptyza/w76tqdey/3