diff --git a/packages/core/src/container/Viewport/Viewport.vue b/packages/core/src/container/Viewport/Viewport.vue
index 728aa295..af3b450f 100644
--- a/packages/core/src/container/Viewport/Viewport.vue
+++ b/packages/core/src/container/Viewport/Viewport.vue
@@ -113,6 +113,8 @@ onMounted(() => {
   const zoomKeyPressed = useKeyPress(zoomActivationKeyCode)
 
   d3Zoom.on('start', (event: D3ZoomEvent<HTMLDivElement, any>) => {
+    if (!event.sourceEvent) return null
+
     isZoomingOrPanning = true
 
     const flowTransform = eventToFlowTransform(event.transform)
@@ -127,6 +129,8 @@ onMounted(() => {
   })
 
   d3Zoom.on('end', (event: D3ZoomEvent<HTMLDivElement, any>) => {
+    if (!event.sourceEvent) return null
+
     isZoomingOrPanning = false
     isDragging = false