diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py
index 15b5265850..1c8734c80d 100644
--- a/cura/Settings/MachineManager.py
+++ b/cura/Settings/MachineManager.py
@@ -17,6 +17,8 @@ from . import ExtruderManager
 from UM.i18n import i18nCatalog
 catalog = i18nCatalog("cura")
 
+import time
+
 class MachineManager(QObject):
     def __init__(self, parent = None):
         super().__init__(parent)
@@ -60,6 +62,10 @@ class MachineManager(QObject):
             self.setActiveMachine(active_machine_id)
             pass
 
+        self._auto_change_material_hotend_flood_window = 10
+        self._auto_change_material_hotend_flood_time = 0
+        self._auto_change_material_hotend_flood_last_choice = None
+
     globalContainerChanged = pyqtSignal()
     activeMaterialChanged = pyqtSignal()
     activeVariantChanged = pyqtSignal()
@@ -98,6 +104,7 @@ class MachineManager(QObject):
 
         containers = UM.Settings.ContainerRegistry.getInstance().findInstanceContainers(type = "variant", definition = self._global_container_stack.getBottom().getId(), name = hotend_id)
         if containers:
+            extruder_manager = ExtruderManager.ExtruderManager.getInstance()
             old_index = extruder_manager.activeExtruderIndex
             if old_index != index:
                 extruder_manager.setActiveExtruderIndex(index)
@@ -105,9 +112,12 @@ class MachineManager(QObject):
                 old_index = None
 
             if self.activeVariantId != containers[0].getId():
-                Application.getInstance().messageBox(catalog.i18nc("@window:title", "Changes on the Printer"), catalog.i18nc("@label", "Do you want to change the hotend to match the hotend in your printer?"),
-                                                     catalog.i18nc("@label", "The hotend on your printer was changed. For best results always slice for the hotend that is inserted in your printer."),
-                                                     buttons = QMessageBox.Yes + QMessageBox.No, icon = QMessageBox.Question, callback = self._hotendChangedDialogCallback, callback_arguments = [index, containers[0].getId()])
+                if time.time() - self._auto_change_material_hotend_flood_time > self._auto_change_material_hotend_flood_window:
+                    Application.getInstance().messageBox(catalog.i18nc("@window:title", "Changes on the Printer"), catalog.i18nc("@label", "Do you want to change the hotend to match the hotend in your printer?"),
+                                                         catalog.i18nc("@label", "The hotend on your printer was changed. For best results always slice for the hotend that is inserted in your printer."),
+                                                         buttons = QMessageBox.Yes + QMessageBox.No, icon = QMessageBox.Question, callback = self._hotendChangedDialogCallback, callback_arguments = [index, containers[0].getId()])
+                else:
+                    self._hotendChangedDialogCallback(self._auto_change_material_hotend_flood_last_choice, index, containers[0].getId())
             if old_index is not None:
                 extruder_manager.setActiveExtruderIndex(old_index)
 
@@ -115,6 +125,9 @@ class MachineManager(QObject):
             Logger.log("w", "No variant found for printer definition %s with id %s" % (definition_id, variant_id))
 
     def _hotendChangedDialogCallback(self, button, index, hotend_id):
+        self._auto_change_material_hotend_flood_time = time.time()
+        self._auto_change_material_hotend_flood_last_choice = button
+
         Logger.log("d", "Setting hotend variant of hotend %d to %s" % (index, containers[0].getId()))
 
         extruder_manager = ExtruderManager.ExtruderManager.getInstance()
@@ -147,9 +160,12 @@ class MachineManager(QObject):
                 old_index = None
 
             if self.activeMaterialId != containers[0].getId():
-                Application.getInstance().messageBox(catalog.i18nc("@window:title", "Changes on the Printer"), catalog.i18nc("@label", "Do you want to change the material to match the material in your printer?"),
-                                                     catalog.i18nc("@label", "The material on your printer was changed. For best results always slice for the material that is inserted in your printer."),
-                                                     buttons = QMessageBox.Yes + QMessageBox.No, icon = QMessageBox.Question, callback = self._materialIdChangedDialogCallback, callback_arguments = [index, containers[0].getId()])
+                if time.time() - self._auto_change_material_hotend_flood_time > self._auto_change_material_hotend_flood_window:
+                    Application.getInstance().messageBox(catalog.i18nc("@window:title", "Changes on the Printer"), catalog.i18nc("@label", "Do you want to change the material to match the material in your printer?"),
+                                                         catalog.i18nc("@label", "The material on your printer was changed. For best results always slice for the material that is inserted in your printer."),
+                                                         buttons = QMessageBox.Yes + QMessageBox.No, icon = QMessageBox.Question, callback = self._materialIdChangedDialogCallback, callback_arguments = [index, containers[0].getId()])
+                else:
+                    self._materialIdChangedDialogCallback(self._auto_change_material_hotend_flood_last_choice, index, containers[0].getId())
             if old_index is not None:
                 extruder_manager.setActiveExtruderIndex(old_index)
 
@@ -157,6 +173,9 @@ class MachineManager(QObject):
             Logger.log("w", "No material definition found for printer definition %s and GUID %s" % (definition_id, material_id))
 
     def _materialIdChangedDialogCallback(self, button, index, material_id):
+        self._auto_change_material_hotend_flood_time = time.time()
+        self._auto_change_material_hotend_flood_last_choice = button
+
         Logger.log("d", "Setting material of hotend %d to %s" % (index, material_id))
 
         extruder_manager = ExtruderManager.ExtruderManager.getInstance()