Unreal Engine Issues
Unreal Engine Issues
FStateTreeExecutionContext::GetDebugInfoString() outputs wrong info and crashes when using linked state trees
UE - AI - Debugging - Apr 17, 2025When using State Trees, the AI Debugger can be accessed during play to show information about their current execution state. If a behavior tree is currently in a state that references a linked tree, ...
Packaging failed with disabled plugin
UE - Foundation - Cpp Tools - Oct 9, 2018Disabling any plugin causes packaging failure. No repro in 4.19 Also occurring when Disabling all platforms except for windows and changing configuration from development to shipping. ...
"Active" marker on shot track scales improperly when using Time Scale
UE - Anim - Sequencer - Apr 21, 2017"Active" marker on shot track scales improperly when using Time Scale ...
Server crashes when client connects after Server has reloaded a sublevel with a deleted actor
UE - Networking - Jul 13, 2017UNetDriver::DestroyedStartupOrDormantActors maintains a list of deleted startup (and dormant) actors. This is used to notify clients that have joined the server of Actors that need to be destroyed ...
Out-of-Bounds Access During Partial Updates of ISMC Per-Instance Custom Data
UE - Graphics Features - Jan 6, 2026When using instance custom data values, removing an instance and changing the number of custom data floats in sequence can cause an array-out-of-bounds crash. The underlying arrays are not resized ...
Client crash on seamless travel in DataReplication with lag
UE - Networking - Jan 11, 2016When server traveling, client may crash due to lag while attempting to replicate object/property. ...
Assertion failed: PlatformNeedsExtraDeletionLatency()
UE - Rendering Architecture - RHI - Mar 5, 2019Animating a HISM along a spline when many other HISMs are present will result in a crash in 4.22. Confirmed in 4.23 MAIN @ CL 5291468 ...
Making changes to a Camera Shake while previewing the Camera Shake triggers a crash
UE - Anim - Sequencer - May 23, 2022This is not a regression. Tested in //UE4/Release-4.27 CL 18319896 Making changes to a Camera Shake while previewing the Camera Shake triggers an Assertion upon compiling. ...
Crash when deleting the Add Component By Class node after changing the Relative Transform of the component
UE - Gameplay - Blueprint - Mar 31, 2021When adding the Add Component By Class node, choosing a class that has a Relative Transform pin, changing the transform, and deleting the node the editor crashes. I tested this with the Skeletal Mes ...
Deleting elements from TMap Struct in actor blueprint editor causes Crash
UE - Editor - UI Systems - Slate - May 24, 2019Deleting elements from TMap Struct in the Actor Blueprint Editor (specifically, deleting elements from them) causes Unreal to crash ...