• [ ] I'm reporting a bug, not asking for help
• [ ] I'm sure this is a Leaflet.MarkerCluster code issue, not an issue with my own code nor with the framework I'm using (Cordova, Ionic, Angular, React…)
• [ ] I've searched through the issues to make sure it's not yet reported

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How to reproduce

• Leaflet version I'm using:
• Leaflet.MarkerCluster version I'm using:
• Browser (with version) I'm using:
• OS/Platform (with version) I'm using:
• step 1
• step 2

What behaviour I'm expecting and which behaviour I'm seeing

Minimal example reproducing the issue

• [ ] this example is as simple as possible
• [ ] this example does not rely on any third party code

Using http://leafletjs.com/edit.html or any other jsfiddle-like site.