FlowLine - parts of the line not displayed when map is zoomed out

[woytekm]

Hello, i have a following problem with FlowLine: when i zoom the map out - layer with FlowLine is rendered only partially.

Properly rendered data:

Zoomed out map, only parts of the line are rendered:

my styleFn:

 function styleFn(f) {
    return new ol.style.FlowLine({
      visible: false,
      lineCap: 'round',
      color: function(f, step){
        return getColor(f.getProperties()['shock']);
      },
      width: 3,
      geometry: function (f) {
        if (f.getGeometry().getType() === 'MultiLineString') {
          return f.getGeometry().getLineString(0);
        } else {
          return f.getGeometry();
        }
       }
      })
    }

Changing line width does not impact the problem. When i remove style from layer, data displays just fine on all zoom levels. Source is GeoJSON file with a large number of LineString features.

[Viglino]

Do you have a working example?