sometimes marker disappear after fitbounds

[Mathilde Pellerin]

Hi all, 

I use leaflet with Leaflet.markercluster plugin (https://github.com/Leaflet/Leaflet.markercluster).

I have a map with L.TileLayer.WMS for base layer, and L.MarkerClusterGroup for markers layer.

It works well, but when I zoom on differents place on the map with map.fitBounds(...), sometimes marker disappear from the map and I have to move the map (drag or zoom with mouse) to make it reappear. 

I have no idea from where this bug comes and I can't figure out how to find it. 

Did someone ever seen this strange behaviour? Can someone guide me to find out what's wrong?

I failed to reproduce this bug on js fiddle because the use of markercluster plugin (sources are not online) and I use custom icons for markers.

Any idea will welcome.

[Mathilde Pellerin]

Good news : I created a little app which reproduce the bug.

the map is initialized on France view with two markers : one in france, and one in Guadeloupe.

Click on the button change view trigger fitbounds on guadeloupe : the marker is not displayed. But move a little the map, and the marker will appear.

[Mathilde Pellerin]

Problem solved : it was a bug in markercluster plugin.

More details here : https://github.com/Leaflet/Leaflet.markercluster/issues/260