Unreal Engine Issues
Unreal Engine Issues
Ensure triggered inside Range Struct Customization when Property Node is no longer valid (e.g. when editing FFloatRange while FRuntimeFloatCurve editor is visible) [Ref. UE-341339]
UE - Editor - Workflow Systems - Nov 12, 2025[Link Removed] was fixed by CL 46990575, successfully avoiding an ensure condition inside FIntervalStructCustomization::SetValue() when its Property Node is no longer valid. However, the same proble ...
Building lighting fails on Linux
UE - Platform - Linux - Jan 15, 2016When building lighting on Linux, the build process fails because UnrealLightmass cannot find the library libUnrealLightmass-Serialization.so. Reported using Mint Cinnamon 17.3 Internal machine uses ...
Instance UObjects in an array on an Actor replaced by pointers to other objects in array while PIE
UE - Gameplay - Blueprint Runtime - Sep 20, 2018When this issue occurs printing out the addresses of each item in the array shows that elements 2 and 3 have the same address, so for some reason the second element's value is being overridden by th ...
Crash when updating phsyics simulated box extent during runtime
UE - Simulation - Physics - May 12, 2017If a Box Collision component is set to simulate physics, calling "Set Box Extent" causes the editor to crash. Workaround: Setting Collision Enabled for the box component to "Physics Only" or "Query ...
UV merging issue when merging meshes with multiple materials
UE - LD & Modeling - Modeling Tools - Mesh Editing - Jul 15, 2019See https://udn.unrealengine.com/questions/505632/view.html for more details Repro: -Have a mesh with 3 sections and 3 materials, assign section 1 to material 1 and section 2&3 to material 3. -Pla ...
Editor crashes on launch after hot reload with multiple modules
Tools - Feb 16, 2017The editor will crash on open after a hot reload if there are multiple modules in the project. Regression: No - behavior also occurs on 4.14.3 (CL 3249277) Workaround: Compiling with the editor clo ...
Servers are not visible to clients in ShooterGame with LAN off
UE - Networking - Jan 17, 2017Server are not visible to clients in ShooterGame when the LAN is set to off. This occurs on all native platforms when trying to connect to each other when the LAN is off. REGRESSION: Yes Worked: 4 ...
Enabling "Show Only Modified Properties" causes details panel menu to disappear
Tools - Feb 27, 2017Enabling "Show Only Modified Properties" causes details panel menu to disappear. Only occurs on actors/components with no modified properties. Regression: YES Worked: 3249277 (4.14.3) Broken: ...
Disabling Gear VR plugin causes packaged game to crash on launch
UE - Platform - XR - May 30, 2017Disabling the Gear VR plugin causes packaged games to crash on launch. This could be related to [Link Removed] but this is new to 4.16 and does not prevent packaging the project, only launching it a ...
UUserWidget::SetPositionInViewport does not function as intended
UE - Editor - UI Systems - Oct 15, 2018The Set Position in Viewport node does affect UserWidgets position. It keeps it 4.19.2 (CL - 4033788), 4.20.3 (CL - 4369336), 4.21 (CL - 4465720), 4.22 (CL - 44654877) ...