Unreal Engine Issues
Unreal Engine Issues
Calling UMoverComponent::IsModifierActiveOrQueued() immediately after calling UMoverComponent::K2_QueueMovementModifier() will return false
UE - Runtime - Character - Mar 10, 2025Calling UMoverComponent::IsModifierActiveOrQueued() immediately after calling UMoverComponent::K2_QueueMovementModifier() will return false. Checking the code, IsModifierActiveOrQueue() calls FindMo ...
Enabling bUpdateComponentTransformToRootBone in a GeometryCollectionComponent causes broken particles to appear in the wrong location
UE - Runtime - Deformable - Jun 22, 2025Enabling bUpdateComponentTransformToRootBone in a GeometryCollectionComponent causes broken particles to appear in the wrong location. When that flag is true, the moment the GeometryCollection (GC) ...
BP using nested child actor components in streaming level causes ensure condition failed
UE - Runtime - Simulation - Jul 11, 2022This never happens on ue5.0.0 The problem appears to be caused by a deleted PhysicsProxy being registered with Solver. Since the solver accesses the deleted PhysicsProxy, it may crash. Checking a ...
Crash when client tries to connect to server instance using WP
UE - Engine Scaling - Streaming - World Partition - Apr 10, 2023Crash when a Deferred Decal (Translucent) base material has a Nanite Override (Masked Surface) Material and the mesh has Nanite + Ray Tracing enabled.
UE - Rendering - Features - Ray Tracing - Aug 14, 2025A crash occurs when Nanite override material instance is used in a project with Ray tracing enabled where: 1 The Material assigned to the static mesh uses Deferred Decal / Translucent and the Nani ...
Editor becomes unresponsive/freezes when a Geometry Collection is destroyed by a Hit Event while simulating
UE - Runtime - Simulation - Apr 19, 2023This is a regression. Tested in //UE5/Release-5.1 CL23901901 When a geometry collection is destroyed by an On Hit event the editor becomes unresponsive and never recovers. No crash is generated. ...
Watch Pin Crash on Softclasspath
UE - Gameplay - Blueprint Editor - Mar 26, 2020Mousing over a softclasspath pin from a struct while debugging a Blueprint can lead to a crash. ...
Landscapes with Tessellation Material do not cast dynamic Shadows
UE - Graphics Features - May 29, 2018Landscapes that have materials with tessellation applied to it will not cast shadows onto movable static meshes Found in 4.19 CL# 4033788 and 4.20 CL# 4096272 Seems to be working as intended in 4. ...
Nativized packaging fails when attaching paper Flipbook component to a parent paper Flipbook component that is Inherited.
UE - Gameplay - Blueprint - Jan 8, 2019Nativized packaging fails when attaching paper Flipbook component to a parent paper Flipbook component that is Inherited. ...
Global illumination Postprocess settings doesn't affect Reflection on Mobile
UE - Platform - Mobile - Jul 29, 2019Postprocess GI related settings look like working in 4.22 on Mobile now, but seems buggy, Not sure if it has supposed to be supported on Mobile since it has no any info in Doc or 4.22's release note ...