Unreal Engine Issues
Unreal Engine Issues
Editor crash when adding to Instanced Static Mesh Component is created/populated at runtime.
Tools - Sep 26, 2017If NewObject is used to create an instanced static mesh component at runtime, populating the component with AddInstance causes the editor to crash. Regression: Yes - repro steps provided did not cr ...
Set Array Elem - saving wrong value
UE - Gameplay - Blueprint - Feb 23, 2018When using the Set Array Elem and an empty Boolean array the results from a print string differ when testing an actors hidden value. It seems that this logic will always return true as it references ...
The ConstructionScript not being called on drag
Tools - May 2, 2019The construction script for a custom actor blueprint does not execute after drag when the scene component is selected. Tested in 4.21.2 (CL - 5660361), 4.22.1 (CL - 6063286), 4.23 (CL - 6248266) ...
Crash when debugging project offscreen
UE - Graphics Features - May 30, 2019Running a project with the RenderOffscreen flag in the DebugGame configuration applied causes the debugger to crash. Tested in 4.21.2 (CL - 4753647), 4.22.1 (CL - 6063286), 4.23 (CL - 6674923) ...
LDR crashes editor on Mac
UE - Platform - Apple - Oct 14, 2021Summary A licensee has reported a crash with HDR.Details A UDN customer has reported that 4.27.1 still crashes when they attempt to enable HDR on macOS. The report also states that the iOS build cra ...
Crash occurs while playing in editor with a State Tree using Bool Compare for a transition state to a child state.
UE - AI - StateTree - Apr 25, 2023This is a regression. Tested in //UE5/Release-5.1 CL2390901 The crash occurred 3/5 times. Crash occurs while playing in editor with a State Tree using Bool Compare for a transition state to a child ...
Sequence thumbnails save with visual issues
zComponent - Archive - Aug 1, 2025[Link Removed] When camera tracks are activated, saving the sequencer results in captured anomalies: 1. Incorrect aspect ratio 2. Additional post-processing effects such as lens flare appear 3. ...
Static Meshes that are reimported with less materials can lead to map check errors on instances that had overriden materials that require manual cleanup
UE - Rendering - Architecture - Feb 5, 2025StaticMeshActors placed in the world can override the default materials of a static mesh. If the static mesh is then reimported with less materials, the actors maintain references to unused material ...
MAC: Very slow texture compression times in Editor
UE - Platform - Apple - Mar 25, 2015There have been a number of complaints about the time it takes to build projects on the Mac - the consistent theme as in the additional URL - is that the editor is thrashing compressing textures. It ...
[CrashReport] Linux crash - FVulkanCommandBufferManager::WaitForCmdBuffer
UE - Graphics Features - Aug 22, 2017This is a semi-common Linux crash coming out of 4.17.1. It is spread among a few different similar callstack affecting a handful of users. [Link Removed] [Link Removed] [Link Removed] [Link Removed ...