diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index 85835db89f..51f524d0a1 100755
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -2,10 +2,9 @@
 # Cura is released under the terms of the LGPLv3 or higher.
 
 import os
-import re
 import sys
 import time
-from typing import cast, TYPE_CHECKING, Optional, Callable, List, Any, Dict
+from typing import cast, TYPE_CHECKING, Optional, Callable, List, Any
 
 import numpy
 from PyQt5.QtCore import QObject, QTimer, QUrl, pyqtSignal, pyqtProperty, QEvent, Q_ENUMS
@@ -1383,29 +1382,22 @@ class CuraApplication(QtApplication):
         if not nodes:
             return
 
-        objects_in_filename = {}  # type: Dict[str, List[CuraSceneNode]]
         for node in nodes:
             mesh_data = node.getMeshData()
+
             if mesh_data:
                 file_name = mesh_data.getFileName()
                 if file_name:
-                    if file_name not in objects_in_filename:
-                        objects_in_filename[file_name] = []
-                    if file_name in objects_in_filename:
-                        objects_in_filename[file_name].append(node)
+                    job = ReadMeshJob(file_name)
+                    job._node = node  # type: ignore
+                    job.finished.connect(self._reloadMeshFinished)
+                    if has_merged_nodes:
+                        job.finished.connect(self.updateOriginOfMergedMeshes)
+
+                    job.start()
                 else:
                     Logger.log("w", "Unable to reload data because we don't have a filename.")
 
-        for file_name, nodes in objects_in_filename.items():
-            for node in nodes:
-                job = ReadMeshJob(file_name)
-                job._node = node  # type: ignore
-                job.finished.connect(self._reloadMeshFinished)
-                if has_merged_nodes:
-                    job.finished.connect(self.updateOriginOfMergedMeshes)
-
-                job.start()
-
     @pyqtSlot("QStringList")
     def setExpandedCategories(self, categories: List[str]) -> None:
         categories = list(set(categories))
@@ -1580,30 +1572,13 @@ class CuraApplication(QtApplication):
     fileLoaded = pyqtSignal(str)
     fileCompleted = pyqtSignal(str)
 
-    def _reloadMeshFinished(self, job) -> None:
-        """
-        Function called whenever a ReadMeshJob finishes in the background. It reloads a specific node object in the
-        scene from its source file. The function gets all the nodes that exist in the file through the job result, and
-        then finds the scene node that it wants to refresh by its object id. Each job refreshes only one node.
-
-        :param job: The ReadMeshJob running in the background that reads all the meshes in a file
-        :return: None
-        """
-        job_result = job.getResult()  # nodes that exist inside the file read by this job
+    def _reloadMeshFinished(self, job):
+        # TODO; This needs to be fixed properly. We now make the assumption that we only load a single mesh!
+        job_result = job.getResult()
         if len(job_result) == 0:
             Logger.log("e", "Reloading the mesh failed.")
             return
-        object_found = False
-        mesh_data = None
-        # Find the node to be refreshed based on its id
-        for job_result_node in job_result:
-            if job_result_node.getId() == job._node.getId():
-                mesh_data = job_result_node.getMeshData()
-                object_found = True
-                break
-        if not object_found:
-            Logger.warning("The object with id {} no longer exists! Keeping the old version in the scene.".format(job_result_node.getId()))
-            return
+        mesh_data = job_result[0].getMeshData()
         if not mesh_data:
             Logger.log("w", "Could not find a mesh in reloaded node.")
             return
diff --git a/plugins/3MFReader/ThreeMFReader.py b/plugins/3MFReader/ThreeMFReader.py
index a368cedd75..670049802d 100755
--- a/plugins/3MFReader/ThreeMFReader.py
+++ b/plugins/3MFReader/ThreeMFReader.py
@@ -52,6 +52,7 @@ class ThreeMFReader(MeshReader):
         self._root = None
         self._base_name = ""
         self._unit = None
+        self._object_count = 0  # Used to name objects as there is no node name yet.
 
     def _createMatrixFromTransformationString(self, transformation: str) -> Matrix:
         if transformation == "":
@@ -86,20 +87,17 @@ class ThreeMFReader(MeshReader):
     ##  Convenience function that converts a SceneNode object (as obtained from libSavitar) to a scene node.
     #   \returns Scene node.
     def _convertSavitarNodeToUMNode(self, savitar_node: Savitar.SceneNode, file_name: str = "") -> Optional[SceneNode]:
+        self._object_count += 1
+
         node_name = savitar_node.getName()
-        node_id = savitar_node.getId()
         if node_name == "":
-            if file_name != "":
-                node_name = os.path.basename(file_name)
-            else:
-                node_name = "Object {}".format(node_id)
+            node_name = "Object %s" % self._object_count
 
         active_build_plate = CuraApplication.getInstance().getMultiBuildPlateModel().activeBuildPlate
 
         um_node = CuraSceneNode() # This adds a SettingOverrideDecorator
         um_node.addDecorator(BuildPlateDecorator(active_build_plate))
         um_node.setName(node_name)
-        um_node.setId(node_id)
         transformation = self._createMatrixFromTransformationString(savitar_node.getTransformation())
         um_node.setTransformation(transformation)
         mesh_builder = MeshBuilder()
@@ -171,6 +169,7 @@ class ThreeMFReader(MeshReader):
 
     def _read(self, file_name: str) -> Union[SceneNode, List[SceneNode]]:
         result = []
+        self._object_count = 0  # Used to name objects as there is no node name yet.
         # The base object of 3mf is a zipped archive.
         try:
             archive = zipfile.ZipFile(file_name, "r")
diff --git a/resources/definitions/geeetech_A10M.def.json b/resources/definitions/geeetech_A10M.def.json
index 6a25e4c407..1b0f46ad98 100644
--- a/resources/definitions/geeetech_A10M.def.json
+++ b/resources/definitions/geeetech_A10M.def.json
@@ -45,7 +45,7 @@
         "machine_max_jerk_e": { "default_value": 2.5 },
         "machine_gcode_flavor": { "default_value": "RepRap (Marlin/Sprinter)" },
         "machine_start_gcode": {
-            "default_value": ";GeeeTech A10M start script\nG28 ;home\nG90 ;absolute positioning\nG1 X0 Y0 Z15 E0 F300 ;go to wait position\nM140 S{material_bed_temperature_layer_0} ;set bed temp\nM190 S{material_print_temperature_layer_0} ;set extruder temp and wait\nG1 Z0.8 F200 ;set extruder height\nG1 X220 Y0 E80 F1000 ;purge line\n;end of start script"
+            "default_value": ";GeeeTech A10M start script\nG28 ;home\nG90 ;absolute positioning\nG1 X0 Y0 Z15 E0 F300 ;go to wait position\nM140 S{material_bed_temperature_layer_0} ;set bed temp\nM109 S{material_print_temperature_layer_0} ;set extruder temp and wait\nG1 Z0.8 F200 ;set extruder height\nG1 X220 Y0 E80 F1000 ;purge line\n;end of start script"
         },
         "machine_end_gcode": {
             "default_value": "G91\nG1 E-1\nG0 X0 Y200\nM104 S0\nG90\nG92 E0\nM140 S0\nM84\nM104 S0\nM140 S0\nM84"
diff --git a/resources/definitions/geeetech_A20M.def.json b/resources/definitions/geeetech_A20M.def.json
index 476741c7fe..d06cf9565f 100644
--- a/resources/definitions/geeetech_A20M.def.json
+++ b/resources/definitions/geeetech_A20M.def.json
@@ -45,7 +45,7 @@
         "machine_max_jerk_e": { "default_value": 2.5 },
         "machine_gcode_flavor": { "default_value": "RepRap (Marlin/Sprinter)" },
         "machine_start_gcode": {
-            "default_value": ";GeeeTech A20M start script\nG28 ;home\nG90 ;absolute positioning\nG1 X0 Y0 Z15 E0 F300 ;go to wait position\nM140 S{material_bed_temperature_layer_0} ;set bed temp\nM190 S{material_print_temperature_layer_0} ;set extruder temp and wait\nG1 Z0.8 F200 ;set extruder height\nG1 X220 Y0 E80 F1000 ;purge line\n;end of start script"
+            "default_value": ";GeeeTech A20M start script\nG28 ;home\nG90 ;absolute positioning\nG1 X0 Y0 Z15 E0 F300 ;go to wait position\nM140 S{material_bed_temperature_layer_0} ;set bed temp\nM109 S{material_print_temperature_layer_0} ;set extruder temp and wait\nG1 Z0.8 F200 ;set extruder height\nG1 X220 Y0 E80 F1000 ;purge line\n;end of start script"
         },
         "machine_end_gcode": {
             "default_value": "G91\nG1 E-1\nG0 X0 Y200\nM104 S0\nG90\nG92 E0\nM140 S0\nM84\nM104 S0\nM140 S0\nM84"
diff --git a/resources/texts/change_log.txt b/resources/texts/change_log.txt
index d17114e3a1..aebf21985b 100644
--- a/resources/texts/change_log.txt
+++ b/resources/texts/change_log.txt
@@ -42,7 +42,7 @@ Fixed a bug where comments were removed from Start/End G-codes when opening from
 Values in the print monitor preheat fields were broken in previous versions, they have now been fixed by fieldOfview.
 
 * Stepper motor disarming during pause at height.
-Some printers automatically disable their steppers after a pause after a certain time. Now it's possible to set that in the pause at height script instead of relying on default behavior of the firmware.
+Some printers (like the Ultimaker S5) have a very heavy build platform. When the pause at height script was enabled, it would disarm the Z stepper motor at pause height. The weight of the build platform would cause the Z axis to lower by gravity and lose the Z position. ilyko96 has contributed a fix to the pause at height script so that the Z stepper motor now remains armed during a pause, locking the build plate in position.
 
 * Flying Bear printers.
 oducceu has contributed a machine definition for the Flying Bear Ghost 4S Printer.