turf.lineIntersect() doesn't work when line coordinate precision is greater than 6

line1 and line2 intersect, they have same last coordinates in both geometry arrays, but lineIntersects returns 0 features. If you change first coordinate in line1, in a way that it has 5, 6 or 7 decimals, lineIntersects return one feature. Code is bellow:

let line1 = {
    "type": "Feature",
    "geometry": {
        "type": "LineString",
        "coordinates": [
            [
                18.9717337097508,
                42.2588785942886
            ],
            [
                18.9721316,
                42.258861
            ]
        ]
    },
    "properties": null
};

let line2 = {
    "type": "Feature",
    "geometry": {
        "type": "LineString",
        "coordinates": [
            [
                18.9886841,
                42.2635654
            ],
            [
                18.9859838,
                42.262568
            ],
            [
                18.9847824,
                42.262127
            ],
            [
                18.9839994,
                42.26183
            ],
            [
                18.9830067,
                42.2614419
            ],
            [
                18.9810483,
                42.2609998
            ],
            [
                18.9792739,
                42.2605528
            ],
            [
                18.9774267,
                42.2601404
            ],
            [
                18.9758575,
                42.2597555
            ],
            [
                18.9737945,
                42.2592482
            ],
            [
                18.9721316,
                42.258861
            ]
        ]
    },
    "properties": null
};

alert(turf.lineIntersect(line1, line2).features.length);

Start at the turf.lineIntersect() entry point and reproduce the supplied line1 and line2 example, then compare results while changing line1's first coordinate precision. Done means the intersecting lines consistently produce one feature, including with the original high-precision coordinates; the payload names no files or tests.