Latest Issues and Bug Reporting (Unreal Engine) topics

Topic	Replies	Views	Activity
Mesh Terrain + RVT + Runtime PCG notworking in PIE unreal-engine	0	54	July 20, 2026
UE 5.8 Crash: Assertion failed Instances.Num() < 65535 in MovieSceneInstanceRegistry when using UMG Widget Animations unreal-engine	0	47	July 19, 2026
Mutable Generating Incorrect Skin Weights in 5.8 Plugins , unreal-engine , skeletalmeshcomponen , skeleton-mesh	2	84	July 19, 2026
UE 5.8 Control Rig Physics - Collision bug/limitation unreal-engine	0	73	July 19, 2026
Character modifiers getting stripped from all NPC Spawners editor , bug-report , unreal-engine , fortnite , unreal-editor-for-fortnite	1	63	July 18, 2026
[Android] SIGSEGV in FScopedJavaObject destructor - inline thread_local UE::Jni::Env yields invalid JNIEnv when accessed from plugin module code unreal-engine	0	38	July 18, 2026
UE 5.8 Movie Render Queue freezes before first frame when Niagara Audio Spectrum is active crash , bug-report , unreal-engine	1	55	August 13, 2026
Data Layer Subsystem Missing the "Set Data Layer Instance Runtime State" Node to Load actors Blueprint , unreal-engine	2	93	July 18, 2026
Lightmass fails to build on Apple Silicon Macs in UE 5.6+ when Embree is enabled. bug-report , Lightmass , Global-Illumination , MAC , unreal-engine , static-lights	0	43	July 18, 2026
Severe progressive FPS loss caused by “Use Latest HUD Elements” during weapon/pickaxe swapping unreal-engine , fortnite , unreal-editor-for-fortnite , fortnite-creative	0	76	July 18, 2026
[UE 5.7][Android XR Preview] Editor crashes when pressing G to toggle Game View unreal-engine	0	36	July 17, 2026
Crash: check(Event.IsValid()) in StateTreeEvents.h:119 — CaptureNewStateEvents treats an unchanged frame's states as newly entered unreal-engine	0	29	July 17, 2026
Status bar Save / Revision Control buttons are one shared Slate widget across asset editors of the same type (dead buttons, mirrored hover, flickering menu) editor , unreal-engine	3	78	July 17, 2026
UE5.8 Substrate Toon BSDF Black Stripes Bug? question , unreal-engine	0	50	July 16, 2026
Modular Control Rig IKFK Broken unreal-engine	0	46	July 16, 2026
LineTraceComponent doesn't work on Per Poly skeletal meshes from 5.3 and up unreal-engine	0	25	July 16, 2026
Spawnable camera missing tracks from script FBX Import editor , unreal-engine , sequence , Python	0	44	July 16, 2026
Eyedropper/Screen Color Picker tool in any version does not work on Linux editor , bug-report , unreal-engine	0	39	July 16, 2026
CRASH caused by unsafe C-style subclass cast in UCharacterMovementComponent::CapsuleTouched CPP , crash , bug-report , unreal-engine	0	45	July 16, 2026
Warning triggered in Metahuman SDK Editor by Crypto Litecoin Wallet address unreal-engine , metahuman	0	37	July 15, 2026
GPU Crash (D3D Device Removed) when placing Nanite Assembly vegetation assets with Nanite Foliage enabled (RTX 5070 Ti, UE 5.7.4) unreal-engine	0	50	July 15, 2026
Mesh Terrain doesn't work with software lumen unreal-engine	1	99	July 15, 2026
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000000 unreal-engine	0	44	July 15, 2026
Public Control Rig Module vars revert to their default after engine restart unreal-engine , rig	0	20	July 15, 2026
Editor startup test fails when using Editor locale not in US unreal-engine	0	31	July 15, 2026
UVerticalBox::ReleaseSlateResources is incorrectly declared as protected instead of public unreal-engine	1	43	July 15, 2026
Spray Emotes always show "Not Ready Yet" in UEFN Edit Mode but work correctly in Creative 1.0 unreal-engine	0	32	July 15, 2026
Spray Emotes always show "Not Ready Yet" in UEFN Edit Mode but work correctly in Creative 1.0 and 2.0 unreal-engine , fortnite-creative	0	31	July 15, 2026
UE 5.8: Movable lights with Light Functions remain counted as shadowed movable lights after Cast Shadows is disabled or actors are deleted unreal-engine	0	48	July 14, 2026
UE5.7.4 - Transform Gizmos completely gone - Disappeared and cannot be returned editor , bug-report , unreal-engine	0	54	July 14, 2026