Unreal Engine Issues
Unreal Engine Issues
Crash when changing parent of Material Instance with Layered Materials and viewing Layer Parameters
UE - Rendering - Architecture - Materials - Aug 1, 2025Reparenting a MaterialInstance that uses Material Layers to another instance with a different layer configuration can cause the editor to crash when opening the Layer Parameters tab. This appears to ...
FDetailGroup::AddGroup does not correctly apply the default expansion state for DetailGroups
UE - Editor - Verse Class Editor - Feb 10, 2026There is a bug affecting DetailGroups in the engine. When adding child DetailGroups to a parent DetailGroup, the expansion state does not behave as expected and ignores the flags intended to control ...
No visual updates when adjusting the curve editor in UMG for the first two points on the timeline
UE - Editor - UI Systems - Jul 6, 2015When Switching the curve editor to cubic interpolations for example moving the blue handles will not change the curve. However, if a third point is add this function works as intended from the 2 poi ...
Blueprint with instance static mesh from construction script will cause crash when using the build then build geometry
Tools - Mar 12, 2015When using a BP with component instance static mesh that is added via the construction script, when using the build button in the toolbar to build lighitng and geometry everything will work correctl ...
Crash Occurs When Using Move Component To and Overlap Event
UE - Gameplay - Jan 29, 2016When using move component to to move a component, and then calling Destroy Actor when the actor overlaps another actor, a crash occurs. In this case, the user was attempting to move their static m ...
HttpChunkInstaller Downloads All Chunk Without Permission
UE - Online - May 11, 2018If user sets InstallSpeed of HttpChunkInstaller to anything other than Pause, the current HttpChunkInstaller checks all Manifests and downloads all Chunks without permission. Licensee wants to begi ...
Editor crash when shader debugging enabled including r.shaders.optimize=0
UE - Rendering - Architecture - Shaders - Jun 23, 2024The editor crashes when activating cvar options for shader compilation and debugging. ...
Piloting character actor with camera not working properly
Tools - Jun 11, 2015When using the pilot function a character actor with a camera actor cannot move around properly. This issue may be due to something with the LevelEditorViewport.cpp UpdateViewForLockedActor function ...
Node Comments don't appear until the node is scrolled over after it is entered
UE - Gameplay - Blueprint - Nov 23, 2016Node Comments don't appear until the node is scrolled over after it is entered This is a Regression. It was working in 4.13.2 but broken in 4.14. User Description: BP node comments hidden until m ...
[CrashReport] Crash on Mac related to cooking for Android - libstdc++.6.dylib!std::_Rb_tree_rotate_left()
UE - Platform - Mobile - Jun 23, 2017This is a common crash on Mac that has occurred since at least 4.12.5. It seems to occur during converting textures while cooking for Android. Callstack from LogLogCook:Display: Cooking /Engine/En ...