diff --git a/plugins/3MFReader/ThreeMFWorkspaceReader.py b/plugins/3MFReader/ThreeMFWorkspaceReader.py
index 8a18d1b698..a9142c6d12 100755
--- a/plugins/3MFReader/ThreeMFWorkspaceReader.py
+++ b/plugins/3MFReader/ThreeMFWorkspaceReader.py
@@ -419,13 +419,17 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
             if parser.has_option("metadata", "enabled"):
                 extruder_info.enabled = parser["metadata"]["enabled"]
             if variant_id not in ("empty", "empty_variant"):
-                extruder_info.variant_info = instance_container_info_dict[variant_id]
+                if variant_id in instance_container_info_dict:
+                    extruder_info.variant_info = instance_container_info_dict[variant_id]
+
             if material_id not in ("empty", "empty_material"):
                 root_material_id = reverse_material_id_dict[material_id]
                 extruder_info.root_material_id = root_material_id
+
             definition_changes_id = parser["containers"][str(_ContainerIndexes.DefinitionChanges)]
             if definition_changes_id not in ("empty", "empty_definition_changes"):
                 extruder_info.definition_changes_info = instance_container_info_dict[definition_changes_id]
+
             user_changes_id = parser["containers"][str(_ContainerIndexes.UserChanges)]
             if user_changes_id not in ("empty", "empty_user_changes"):
                 extruder_info.user_changes_info = instance_container_info_dict[user_changes_id]
@@ -905,6 +909,10 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                 continue
             extruder_info = self._machine_info.extruder_info_dict[position]
             if extruder_info.variant_info is None:
+                # If there is no variant_info, try to use the default variant. Otherwise, leave it be.
+                node = variant_manager.getDefaultVariantNode(global_stack.definition, VariantType.NOZZLE, global_stack)
+                if node is not None and node.getContainer() is not None:
+                    extruder_stack.variant = node.getContainer()
                 continue
             parser = extruder_info.variant_info.parser
 
diff --git a/plugins/UM3NetworkPrinting/src/Cloud/CloudOutputDevice.py b/plugins/UM3NetworkPrinting/src/Cloud/CloudOutputDevice.py
index 8d872d33f5..8d94f41ea5 100644
--- a/plugins/UM3NetworkPrinting/src/Cloud/CloudOutputDevice.py
+++ b/plugins/UM3NetworkPrinting/src/Cloud/CloudOutputDevice.py
@@ -422,6 +422,7 @@ class CloudOutputDevice(NetworkedPrinterOutputDevice):
         return [print_job for print_job in self._print_jobs if
                 print_job.assignedPrinter is not None and print_job.state != "queued"]
 
+    ##  Set the remote print job state.
     def setJobState(self, print_job_uuid: str, state: str) -> None:
         self._api.doPrintJobAction(self._cluster.cluster_id, print_job_uuid, state)
 
diff --git a/plugins/UM3NetworkPrinting/src/ClusterUM3OutputDevice.py b/plugins/UM3NetworkPrinting/src/ClusterUM3OutputDevice.py
index 6fbb115601..5344fe2021 100644
--- a/plugins/UM3NetworkPrinting/src/ClusterUM3OutputDevice.py
+++ b/plugins/UM3NetworkPrinting/src/ClusterUM3OutputDevice.py
@@ -390,6 +390,13 @@ class ClusterUM3OutputDevice(NetworkedPrinterOutputDevice):
         data = "{\"force\": true}"
         self.put("print_jobs/{uuid}".format(uuid=print_job_uuid), data, on_finished=None)
 
+    # Set the remote print job state.
+    def setJobState(self, print_job_uuid: str, state: str) -> None:
+        # We rewrite 'resume' to 'print' here because we are using the old print job action endpoints.
+        action = "print" if state == "resume" else state
+        data = "{\"action\": \"%s\"}" % action
+        self.put("print_jobs/%s/action" % print_job_uuid, data, on_finished=None)
+
     def _printJobStateChanged(self) -> None:
         username = self._getUserName()
 
diff --git a/plugins/UM3NetworkPrinting/src/ClusterUM3PrinterOutputController.py b/plugins/UM3NetworkPrinting/src/ClusterUM3PrinterOutputController.py
index 370cfc9008..103be8b01e 100644
--- a/plugins/UM3NetworkPrinting/src/ClusterUM3PrinterOutputController.py
+++ b/plugins/UM3NetworkPrinting/src/ClusterUM3PrinterOutputController.py
@@ -7,6 +7,7 @@ MYPY = False
 if MYPY:
     from cura.PrinterOutput.Models.PrintJobOutputModel import PrintJobOutputModel
 
+
 class ClusterUM3PrinterOutputController(PrinterOutputController):
     def __init__(self, output_device):
         super().__init__(output_device)
@@ -15,6 +16,5 @@ class ClusterUM3PrinterOutputController(PrinterOutputController):
         self.can_control_manually = False
         self.can_send_raw_gcode = False
 
-    def setJobState(self, job: "PrintJobOutputModel", state: str):
-        data = "{\"action\": \"%s\"}" % state
-        self._output_device.put("print_jobs/%s/action" % job.key, data, on_finished=None)
+    def setJobState(self, job: "PrintJobOutputModel", state: str) -> None:
+        self._output_device.setJobState(job.key, state)
diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index be9ae0920a..02205a33ec 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -1426,7 +1426,7 @@
                 "z_seam_corner":
                 {
                     "label": "Seam Corner Preference",
-                    "description": "Control whether corners on the model outline influence the position of the seam. None means that corners have no influence on the seam position. Hide Seam makes the seam more likely to occur on an inside corner. Expose Seam makes the seam more likely to occur on an outside corner. Hide or Expose Seam makes the seam more likely to occur at an inside or outside corner.",
+                    "description": "Control whether corners on the model outline influence the position of the seam. None means that corners have no influence on the seam position. Hide Seam makes the seam more likely to occur on an inside corner. Expose Seam makes the seam more likely to occur on an outside corner. Hide or Expose Seam makes the seam more likely to occur at an inside or outside corner. Smart Hiding allows both inside and outside corners, but chooses inside corners more frequently, if appropriate.",
                     "type": "enum",
                     "options":
                     {