diff --git a/src/MarkerClusterGroup.js b/src/MarkerClusterGroup.js
index c741fb6e..1b514655 100644
--- a/src/MarkerClusterGroup.js
+++ b/src/MarkerClusterGroup.js
@@ -75,6 +75,8 @@ L.MarkerClusterGroup = L.FeatureGroup.extend({
 		L.extend(this, animate ? this._withAnimation : this._noAnimation);
 		// Remember which MarkerCluster class to instantiate (animated or not).
 		this._markerCluster = animate ? L.MarkerCluster : L.MarkerClusterNonAnimated;
+		//Set the initial clear layers count to 0
+		this._clearLayersCallCount = 0;
 	},
 
 	addLayer: function (layer) {
@@ -199,13 +201,17 @@ L.MarkerClusterGroup = L.FeatureGroup.extend({
 		    l = layersArray.length,
 		    offset = 0,
 		    originalArray = true,
-		    m;
+		    m,
+		    clearLayerIndexWhenStarted = this._clearLayersCallCount;
 
 		if (this._map) {
 			var started = (new Date()).getTime();
 			var process = L.bind(function () {
 				var start = (new Date()).getTime();
 				for (; offset < l; offset++) {
+					if (clearLayerIndexWhenStarted !== this._clearLayersCallCount) {
+						break;
+					}
 					if (chunked && offset % 200 === 0) {
 						// every couple hundred markers, instrument the time elapsed since processing started:
 						var elapsed = (new Date()).getTime() - start;
@@ -260,6 +266,10 @@ L.MarkerClusterGroup = L.FeatureGroup.extend({
 					}
 				}
 
+				if (clearLayerIndexWhenStarted !== this._clearLayersCallCount) {
+					return;
+				}
+
 				if (chunkProgress) {
 					// report progress and time elapsed:
 					chunkProgress(offset, l, (new Date()).getTime() - started);
@@ -419,6 +429,8 @@ L.MarkerClusterGroup = L.FeatureGroup.extend({
 			delete this._gridUnclustered;
 		}
 
+		++this._clearLayersCallCount;
+
 		if (this._noanimationUnspiderfy) {
 			this._noanimationUnspiderfy();
 		}