diff --git a/plugins/CuraEngineBackend/CuraEngineBackend.py b/plugins/CuraEngineBackend/CuraEngineBackend.py
index 68d45d0b74..c612a6656c 100644
--- a/plugins/CuraEngineBackend/CuraEngineBackend.py
+++ b/plugins/CuraEngineBackend/CuraEngineBackend.py
@@ -335,6 +335,7 @@ class CuraEngineBackend(Backend):
                 if self._stored_layer_data:
                     job = ProcessSlicedObjectListJob.ProcessSlicedObjectListJob(self._stored_layer_data)
                     job.start()
+                    self._stored_layer_data = None
             else:
                 self._layer_view_active = False