issue4294

diff --git a/js/parts/Axis.js b/js/parts/Axis.js
index 0b5a1b5..d933a04 100644
--- a/js/parts/Axis.js
+++ b/js/parts/Axis.js
@@ -134,7 +134,7 @@ Axis.prototype = {
 			//textAlign: dynamic,
 			//rotation: 0,
 			formatter: function () {
-				return Highcharts.numberFormat(this.total, -1);
+				return this.nullCount ? '' : Highcharts.numberFormat(this.total, -1);
 			},
 			style: merge(defaultPlotOptions.line.dataLabels.style, { color: '#000000' })
 		}
diff --git a/js/parts/Stacking.js b/js/parts/Stacking.js
index ef16043..2c13cbb 100644
--- a/js/parts/Stacking.js
+++ b/js/parts/Stacking.js
@@ -18,6 +18,7 @@ function StackItem(axis, options, isNegative, x, stackOption) {
 
 	// Initialize total value
 	this.total = null;
+	this.nullCount = 0;
 
 	// This will keep each points' extremes stored by series.index and point index
 	this.points = {};
@@ -219,6 +220,8 @@ Series.prototype.setStackedPoints = function () {
 			if (oldStacks[key] && oldStacks[key][x]) {
 				stacks[key][x] = oldStacks[key][x];
 				stacks[key][x].total = null;
+				stacks[key][x].nullCount = 0;
+
 			} else {
 				stacks[key][x] = new StackItem(yAxis, yAxis.options.stackLabels, isNegative, x, stackOption);
 			}
@@ -253,6 +256,10 @@ Series.prototype.setStackedPoints = function () {
 		stack.points[pointKey].push(stack.cum);
 		stackedYData[i] = stack.cum;
 
+		if (y === null) {
+			stack.nullCount++;
+		}
+
 	}
 
 	if (stacking === 'percent') {