Unreal Engine Issues

Navmesh does not update when undoing the scaling of Navmesh Bounds Volume

REGRESSION: Yes, does not occur in 4.17.2 Navmesh does not automatically update when the user undoes the scaling of a nav mesh bounds volume. This issue occurs with both changing the scale in the ...

Typo in source version of OpenGLWindows.h

The type definitions for the Enum Macros glObjectLabelKHR and glObjectPtrLabelKHR are misspelled. Working in 4.19.2 Broken in 4.20 Tested 4.19.2 (CL - 4033788) and 4.20 (CL - 4214897) ...

Character standing on physics object causes severe glitches

Trying to stand on an object with physics enabled using the default third person template causes some very weird behavior. The object and character will jitter wildly and launch either one far away. ...

Physics Constraints not being applied to Procedural Meshes

Procedural meshes with physics enabled created at runtime do not attach. ( Warning in Edtior: Constraint in '/Game/Maps/UEDPIE_0_Default.Default:PersistentLevel.withSMC_0.PhysicsTestSMC' attempting ...

A non-support tonemap ps shader permutation is choosed while rendering movie render queue on mobile preview mode.

"If" node in materials causing striped artefacts when passing "Material Attributes"

Unreal Architecture link in Unreal Terminology website doesn't work

Unreal Architecture web link doesn't work. A user cannot enter the website to see the terminology of the Unreal Architecture. ...

Crash sometimes occurs when enabling the Gravity tool on part of a Sketchfab object.

Current state Triggering Gravity on element from Sketchfab object's tree, may result in crash. For 100% reproduction rate, download 'Rank 3 Police Unit' object and apply Gravity to its element 'Rank ...

Twinmotion sign-in error when attempting sign-in inside app

Reported in SF [Link Removed] Attempting to sign into Twinmotion from within the TM 2026.1 editor results in a consistent sign-in error using the sign-in buttons. Initial sign-in during launch whe ...

Massive FPS drops in editor when moving mouse over menu items on Linux

Navigating various dropdown menus in the Editor causes the FPS to drop down to around 25 or 10 in the Viewport on an empty project. This does not reproduce on Windows with -vulkan This issues was ...