Unreal Engine Issues
Unreal Engine Issues
Crash when adding sphere reflection capture to a scene
UE - Graphics Features - Jan 30, 2017An occasional crash occurs when adding a sphere reflection capture to the scene from the place mode panel. This issue has a low repro, but has been seen a couple times. Repro rate seems to be around ...
Soft angular constraints solve velocity like hard constraints
UE - Simulation - Core - Jul 17, 2025Soft angular constraints are solving velocity like hard constraints. Instead of swinging back and forth, the affected body just snaps to 45 degrees. Check the steps to reproduce for more details. Th ...
Starting position of physics simulated bp is different in Standalone Game
UE - Simulation - Physics - Feb 26, 2016Starting position of physics simulated bp is different in Standalone Game User Description: Things work fine in the editor window, but when I run a standalone game then blueprints with physics bod ...
Get Random Point In Radius does not return certain vectors
UE - AI - Mar 25, 2015https://answers.unrealengine.com/questions/198619/get-random-point-in-radius-does-not-work-properly.html "Get Random Point In Radius" will leave one square sector empty. Seems like it creates patch ...
Crash when using StaticDuplicateObject with mismathced Source and Destination class types
UE - Foundation - Jun 19, 2025Starting in Unreal Engine 5.4, StaticDuplicateObject internally switched to using Unversioned Property Serialization (UPS) for performance reasons. However, UPS assumes the source and destination ob ...
Open a level that contains instanced meshes (with built lighting) will crash the editor
UE - Graphics Features - Mar 14, 2015Open a level that contains instanced meshes will crash the editor. Per the users description, the level must have had lighting built and then another level loaded or the editor restarted. Once the ...
Open a level that contains instanced meshes (with built lighting) will crash the editor
UE - Graphics Features - Mar 19, 2015Open a level that contains instanced meshes will crash the editor. Per the users description, the level must have had lighting built and then another level loaded or the editor restarted. Once the ...
Linux editor can fail on start due to a stale TPS library in Engine/Binaries/Linux
UE - Platform - Linux - May 21, 2015For 4.8, we moved LinuxNativeDialogs, a third-party library, to a different location (and also changed its API somewhat, so the old library is binary incompatible). However, some users apparently a ...
Gradual drop in Performance on Windows 10 projects after Toggling Fullscreen
Tools - Nov 30, 2015It seems that when working in any project on a Windows 10 machine, there is a gradual rise in frames per second and a consistent drop in performance. The user reporting this issue claims his frame ...
Slider Values are not working inside of a blueprint
UE - Gameplay - Blueprint - May 7, 2015Slider Values are not working inside of a blueprint in 4.8 Preview 1. User Description: Problem with the numeric float/int boxes in the editor in Blueprints, if for example open the TPS Template a ...