Unreal Engine Issues
Unreal Engine Issues
Crash when removing mesh and undoing in Character Blueprint
UE - Gameplay - Blueprint Editor - Aug 9, 2023When removing a mesh from a Character BP and undoing the engine will crash. This issue is occurring in //UE5/Release-5.3 @ CL 26560699 This issue is NOT occurring in //UE5/Release-5.2 @ CL 2600198 ...
Static Offset in IK Retargeter does not save position when restarting the editor
UE - Anim - Rigging - Retargeting - Sep 19, 2023When editing an IK retargeter, a static offset's value will get reverted to zero when UE is restarted. Tested in the following: //UE5-Release-5.3-CL-27405482 //UE5/Release-5.2-CL-26001984 ...
Capturing backtrace of another thread in engine built with clang raises access violation exception
UE - CoreTech - Jan 11, 2024Engine built with Clang throws an exception when calling RtlVirtualUnwind with a different thread ID. Engines built with Microsoft compilers do not occur this problem. For example, if starting PI ...
Linker Instancing Context duplication results in OOM
UE - World Creation - Worldbuilding Tools - OFPA - Aug 16, 2024In order to fix a major issue involving dissapearing actors during cook, we added instancing context duplication in 31925640. This actually undoes the optimization made from 26543720 Both reported ...
UE5.6+ - Mutable - IDPrefix crash when combining Child Objects, Add to Mesh Component and Extend Mesh Section.
UE - Anim - Mutable - Jul 21, 2025So the issue seems to be a combination of Add To Mesh Component and Extend Mesh Section. I've tried this in Epic Launcher 5.6, 5.6 in-house modified engine as well as ue5-main 5.7 from git (editor ...
GetOverlappingComponents does not work on Mobile
UE - Simulation - Physics - Jun 13, 2016The GetOverlappingComponents node isn't working correctly on mobile devices. It seems like it may only not be registering components that are spawned at runtime, as it does change the number of over ...
CharacterMovementComponent::ApplyRepulsionForce uses the BodyIndex incorrectly as a bone index
UE - Simulation - Physics - Oct 5, 2015The code to extract the FBodyInstance from the overlapping component is incorrectly interpreting the Overlap.BodyIndex as a BoneIndex. This results in incorrect bodies getting the force applied, as ...
Media Player assets do not play in packaged games or in standalone
Tools - Mar 8, 2016Media Players and their associated textures do not render in standalone game or in a packaged project. Found on: //UE4/Release-4.11 CL-2897738 Checked 4.9.2 Binary from launcher, issue occurs ther ...
Non-overridden BP update for Animation Blueprints not Calling Parent Function.
OLD - Anim - Mar 21, 2016User in the linked UDN reports that the parent BP update was not being called in an animation blueprint unless they hooked up the parent call. By default this call is greyed out in the graph and sh ...
Exiting VR Edit mode from simulating causes viewport mismatch
UE - Editor - Workflow Systems - Mar 5, 20169/19 VREditor sync notes: Should grey out the editor button while you're simulating ----------------------------------------- I noticed you can fix this issue by reseting the viewport by pressing t ...