Issues

• [Feature] Newton backend: callback between collide and solver step

  isaac-sim-physicsisaac-sim-v6-1-0
  isaac-sim/IsaacSim#898 · Filter by author PeterL-NV opened on Oct 21, 2026
  1

• RTX LiDAR LaserScan uses -1.0 for no-return measurements instead of +inf

  isaac-sim-rosisaac-sim-v6-2-0
  isaac-sim/IsaacSim#897 · Filter by author sybaekrinfra opened on Oct 21, 2026
  1

• Incorrect LaserScan angular resolution for solid-state RTX LiDAR in Isaac Sim

  isaac-sim-rosisaac-sim-v6-2-0
  isaac-sim/IsaacSim#896 · Filter by author sybaekrinfra opened on Oct 21, 2026
  1

• ROS2Subscriber: setting messageName segfaults (libisaacsim.ros2.nodes.plugin.so) when the ROS 2 bridge failed to load

  isaac-sim-rosisaac-sim-v6-0-1isaac-sim-v6-2-0
  isaac-sim/IsaacSim#892 · Filter by author l-tschreiber-a11y opened on Oct 19, 2026
  1

  

• post_install.bat missing for isaac sim 6.2.0

  isaac-sim-setupinstallationsisaac-sim-v6-2-0
  isaac-sim/IsaacSim#889 · Filter by author iameijaz opened on Oct 16, 2026
  7

• Writer.detach() fails after labelling with rep.get.prims() + rep.modify.semantics()

  isaac-sim-sdgisaac-sim-v6-1-0regression
  isaac-sim/IsaacSim#888 · Filter by author franz6ko opened on Oct 15, 2026
  3

• Viewport reference grid rendered into the first captured frame intermittently

  isaac-sim-sdgisaac-sim-v6-1-0
  isaac-sim/IsaacSim#887 · Filter by author franz6ko opened on Oct 15, 2026
  2

  

• [BUG] Isaac Sim 6.1/6.2 Experiencing Physx Physics Simulation Behaviour Under Newton Physics

  isaac-sim-physicsisaac-sim-v6-1-0
  isaac-sim/IsaacSim#884 · Filter by author KEYL-PH opened on Oct 15, 2026
  1

• The base diffuse roughness of OpenPBR MaterialX incorrectly considers the surface base color. This wrongly shades MaterialX materials.

  isaac-sim-ovisaac-sim-v6-1-0
  isaac-sim/IsaacSim#882 · Filter by author 2lian opened on Oct 14, 2026
  2

  

• Isaac Sim 6.1 CUPTI conflict slows PyTorch workloads

  isaac-sim-perfisaac-sim-v6-1-0
  isaac-sim/IsaacSim#881 · Filter by author flm8620 opened on Oct 14, 2026
  1

• URDF import: merge_fixed_joints rotates origins with pitch −π/2 by 180° about x

  isaac-sim-robot-import-exportisaac-sim-v6-1-0isaac-sim-v6-2-0
  isaac-sim/IsaacSim#880 · Filter by author NeoZng opened on Oct 14, 2026
  2

  

• RTX Real-Time 2.0 renders black with DLSS/DLAA on RTX 5090; persists after upgrading to Isaac Sim 6.1.0 and driver 595.58.03

  isaac-sim-sdgisaac-sim-v6-0-0isaac-sim-v6-1-0
  isaac-sim/IsaacSim#879 · Filter by author njayboehme opened on Oct 14, 2026
  5

• [Bug] Spammy "Unable to create mesh representation for prim .../CollisionPlane, raycast will skip it" warnings with omni.anim.behavior.core + default-environment ground plane

  isaac-sim-ovisaac-sim-v6-1-0
  isaac-sim/IsaacSim#878 · Filter by author holdmypanda opened on Oct 13, 2026
  1

  

• Standalone Python process remains alive after SimulationApp.close() returns (Isaac Sim 5.1.0.0)

  isaac-sim-apiisaac-sim-v5-1-0
  isaac-sim/IsaacSim#877 · Filter by author FrankAsanteVanLaarhoven opened on Oct 13, 2026
  1

• Script Editor won't let me copy output

  isaac-sim-ovisaac-sim-v6-1-0
  isaac-sim/IsaacSim#874 · Filter by author iameijaz opened on Oct 10, 2026
  4

  

• Docs: Python SIGALRM callbacks cannot guarantee a GIL-independent shutdown watchdog

  bugisaac-sim-documentation
  isaac-sim/IsaacSim#872 · Filter by author wee733 opened on Oct 8, 2026
  2

• SimulationManager.register_callback keeps bound-method owners alive; every short-lived Prim wrapper leaks (severe with isaacsim.ros2.sim_control)

  bugisaac-sim-apiisaac-sim-v6-0-1isaac-sim-v6-1-0
  isaac-sim/IsaacSim#870 · Filter by author aje0005 opened on Oct 7, 2026
  1

• SimulationApp exits with status 0 after an unhandled exception

  isaac-sim-apiisaac-sim-v6-1-0
  isaac-sim/IsaacSim#867 · Filter by author NeoZng opened on Oct 2, 2026
  1

  

• URDF/MJCF import with fix_base=True gives a floating-base PhysX articulation (apply_fix_base skips existing fixed anchors)

  isaac-sim-robot-import-exportisaac-sim-v6-1-0
  isaac-sim/IsaacSim#859 · Filter by author NeoZng opened on Sep 29, 2026
  3

  

• URDF import: merge_fixed_joints removes fixed-child frames (tool0, sensor links) and ignores dont_collapse

  isaac-sim-robot-import-exportisaac-sim-v6-0-0isaac-sim-v6-1-0regression
  isaac-sim/IsaacSim#858 · Filter by author NeoZng opened on Sep 29, 2026
  1

  

• MJCF import: actuator gains reach the PhysX drive 57.3x too high; kp-only, gear and actuatorfrcrange ignored

  isaac-sim-robot-import-exportisaac-sim-v6-1-0
  isaac-sim/IsaacSim#857 · Filter by author NeoZng opened on Sep 29, 2026
  1

  

• MJCF import: joint frictionloss, damping and armature are lost or mis-mapped on PhysX

  isaac-sim-robot-import-exportisaac-sim-v6-1-0
  isaac-sim/IsaacSim#856 · Filter by author NeoZng opened on Sep 29, 2026
  1

  

• Release build skips fetching a missing pip prebundle when its pull marker is newer

  isaac-sim-setupinstallationsisaac-sim-v6-1-0
  isaac-sim/IsaacSim#852 · Filter by author makosdanii opened on Sep 28, 2026
  4

  

• [Newton] UpAxis causes an abrupt change in orientation when playing.

  isaac-sim-physicsisaac-sim-v6-0-1
  isaac-sim/IsaacSim#851 · Filter by author koubaa opened on Sep 23, 2026
  2

  

• low fps with xeon cpu and rtx4090

  isaac-sim-perfisaac-sim-v6-0-1
  isaac-sim/IsaacSim#849 · Filter by author pangze111 opened on Sep 22, 2026
  8