Rare assertion comes up when cooking if sequencer camera track has only additive transform track

UE - Anim - Sequencer - Mar 2, 2020

If a camera track has only additive transform track, some functions return uninitialized F3DTransformTrackToken made by default constructor. It causes a rare assertion. Please take a look at F3DTra ...

Undo function breaks local variables in Blueprint Function after compiling

UE - Gameplay - Oct 8, 2020

Blueprint functions appear to correctly associate local variables when renaming the function. However when undoing a rename with ctrl-z the local variables appear to lose their association. Redoing ...

Widget Blueprint breakpoints hit during a Tick event do not engage the debugger.

UE - Editor - UI Systems - Jun 13, 2024

The user comment on the Salesforce issue " This is a regression from the behaviour in 5.3.X, and I've reproduced it in 5.4.0, 5.4.1, and 5.4.2. The specific issue/change that caused this regression ...

FCableSceneProxy::BuildCableMesh thrashes memory allocator

UE - Simulation - Physics - Feb 12, 2025

FCableSceneProxy::BuildCableMesh in CableComponent.cpp:233 showed up as a hot spot in profiling because the two TArray allocators in SetDynamicData_RenderThread used by BuildCableMesh are created an ...

Trigger Volume Blocks First-Person Template Projectile

UE - Simulation - Physics - Nov 2, 2015

When playing in editor, if you fire your weapon at a trigger volume, the projectiles will bounce off of the volume, regardless of the fact that the collision is set to Query Only. This collision als ...

World Displacement is behaving incorrectly on Landscapes

UE - LD & Modeling - Terrain - Landscape - May 21, 2015

When applying a Landscape Layer Coordinate to a Base Texture and a Displacement Map Texture, the two textures do not line up correctly on a tessellated landscape. When reproducing this I noticed in ...

A Behavior Tree reference to a Blackboard Key will become invalid when the name of the Key is changed in the Blackboard

UE - AI - Oct 5, 2015

A Behavior Tree reference to a Blackboard Key will become invalid when the name of the Key is changed in the Blackboard. Clicking on the Behavior Tree node that references the key will update the ke ...

Deleting a Struct Attached to a Variable in a Blueprint Prevents it from Compiling

UE - Gameplay - Blueprint - Oct 20, 2015

Adding a variable of the type of a struct to a blueprint, deleting that struct, and then recompiling the blueprint fails. The variable is deleted, but the blueprint will continue to be unable to com ...

editor crashes when variable inside of a struct is set to a class type then the object is moved to a new folder

UE - Gameplay - Blueprint - Mar 17, 2015

If a struct has a variable set to a class type, then the object of that class type is moved to a new folder in the editor, the struct will replace the class type with "class", which causes the edito ...

SVN plugin unable to differentiate between two working copies when using same login

Tools - Jan 3, 2017

Whenever you use the same login to connect to SVN source control in the editor, the editor's SVN plugin is unable to differentiate between two working copies of the same repo. Any checkouts made in ...