diff --git a/cura/Arranging/Nest2DArrange.py b/cura/Arranging/Nest2DArrange.py
index cdf590232c..334d920fde 100644
--- a/cura/Arranging/Nest2DArrange.py
+++ b/cura/Arranging/Nest2DArrange.py
@@ -75,7 +75,7 @@ def findNodePlacement(nodes_to_arrange: List["SceneNode"], build_volume: "BuildV
         # Clip the disallowed areas so that they don't overlap the bounding box (The arranger chokes otherwise)
         clipped_area = area.intersectionConvexHulls(build_plate_polygon)
 
-        if clipped_area.getPoints() is not None:  # numpy array has to be explicitly checked against None
+        if clipped_area.getPoints() is not None and len(clipped_area.getPoints()) > 2:  # numpy array has to be explicitly checked against None
             for point in clipped_area.getPoints():
                 converted_points.append(Point(int(point[0] * factor), int(point[1] * factor)))
 
@@ -88,7 +88,7 @@ def findNodePlacement(nodes_to_arrange: List["SceneNode"], build_volume: "BuildV
         converted_points = []
         hull_polygon = node.callDecoration("getConvexHull")
 
-        if hull_polygon is not None and hull_polygon.getPoints() is not None:  # numpy array has to be explicitly checked against None
+        if hull_polygon is not None and hull_polygon.getPoints() is not None and len(hull_polygon.getPoints()) > 2:  # numpy array has to be explicitly checked against None
             for point in hull_polygon.getPoints():
                 converted_points.append(Point(point[0] * factor, point[1] * factor))
             item = Item(converted_points)
diff --git a/plugins/UM3NetworkPrinting/src/ExportFileJob.py b/plugins/UM3NetworkPrinting/src/ExportFileJob.py
index 12f5a28877..953b167a6e 100644
--- a/plugins/UM3NetworkPrinting/src/ExportFileJob.py
+++ b/plugins/UM3NetworkPrinting/src/ExportFileJob.py
@@ -1,6 +1,7 @@
 # Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
+import re  # Filtering out invalid characters.
 from typing import List, Optional
 
 from UM.FileHandler.FileHandler import FileHandler
@@ -27,6 +28,7 @@ class ExportFileJob(WriteFileJob):
 
         # Determine the filename.
         job_name = CuraApplication.getInstance().getPrintInformation().jobName
+        job_name = re.sub("[^\w\-. ()]", "-", job_name)
         extension = self._mesh_format_handler.preferred_format.get("extension", "")
         self.setFileName("{}.{}".format(job_name, extension))