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

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

Start with the lineOverlap entry point and reproduce the case from the linked JSFiddle using the two MultiLineStrings in the issue. Compare the reported overlap with the expected complete overlap, including the shared segments within each MultiLineString; done means the overlap is displayed correctly for this case.