GEOS cuts LineString by short direct lines, after difference with Polygon

[Surzhikov]

Hi, Thank you for GeoPHP.
I found a strange behavior of geos. Maybe you can help me.

I got 2 objects: Polygon and LineString (loaded from valid GeoJSON).

Polygon: GeoJSON

LineString: GeoJSON

I want to CUT LineString by Polygon;
So i do:

/* Getting JSONs from files */
$PolygonJson = file_get_contents("PolygonJson.json");
$LineStringJson = file_get_contents("LineStringJson.json");

/* geoPHP instances */
$Polygon = geoPHP::load($PolygonJson,'json');
$LineString = geoPHP::load($LineStringJson,'json');

/* geos */
$Polygon_geos = $Polygon->geos();
$LineString_geos = $LineString->geos();

/* difference */
$difference_geos = $LineString_geos->difference($Polygon_geos);
$difference = geoPHP::geosToGeometry($difference_geos);
$differeceGeoJSONArray = json_decode($difference->out('json'), true);
file_put_contents("difference.json", $difference->out('json'));

I expect to get MultiLineString object (with 3 LineStrings), but I get 2 normal (fully, intact) LineStrings and 1 cropped LineString (it cropped by short direct LineString of 2 points).

difference.json: GeoJSON,

At the first see - it is OK

But Zoomed MAP Screenshot - line is non-intact :(((

issue description: geos crops LineString for short (2 points) direct lines.

[Surzhikov]

update:
Cut points - is the point of "self-intersection" (of the StringLine)