Layers disappear when panning in DukeScript Leaflet4j

Question

I am test driving Leaflet4j inside of JavaFX combo.

When I run the l4jfxdemo project and then drag the map the circle and polygon layers disappear. They do not disappear when zooming. I added a DragEndListener to enumerate the layers and they are still there but don't show on the map. When you zoom in or out you can see them appear for a brief moment.

I recompiled Leaflet4j with different versions of Leaflet but it made no difference. I also tried various map options as well as redrawing of the layers after panning but still no joy.

What could be causing this behaviour?

Answer 1

After the map dragging ends (when DragEndListener is triggered), try explicitly redrawing the layers. Sometimes, dragging the map might trigger a rendering issue that can be resolved by forcing a redraw.