Unreal Engine Issues
Unreal Engine Issues
Rare assertion comes up when cooking if sequencer camera track has only additive transform track
UE - Anim - Sequencer - Mar 2, 2020If 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, 2020Blueprint 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 ...
Editing parent emitters with mesh renderer in a niagara system causes crash
UE - Niagara - Nov 9, 2021After editing the parent emitters of a Niagara system with mesh renderer particles the engine will crash the next time the editor and system are opened. This was tested with both engine content cub ...
Widget Blueprint breakpoints hit during a Tick event do not engage the debugger.
UE - Editor - UI Systems - Jun 13, 2024The 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, 2025FCableSceneProxy::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 ...
SVN plugin unable to differentiate between two working copies when using same login
Tools - Jan 3, 2017Whenever 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 ...
Crash in Debug Camera (patch provided in comment !)
UE - Gameplay - Feb 12, 2019Hello, A licensee has reported us a crash in DebugCameraController / DebugCameraHUD. It is due to a missing check in ADebugCameraHUD::PostRender() of SelectedActor set in ADebugCameraController ...
Error during packaging if nativizing a blueprint that contains a TMap with a UserDefinedEnum as a key
UE - Gameplay - Blueprint - Jun 17, 2019Certain Map container calls (e.g. Find, Add) will fail to compile at packaging time if a Blueprint class containing a Map variable with a user-defined enumeration as the key type is nativized. This ...
Waking both of a constraint's rigidbodies re-enables collisions between constrained actors that were disabled by a Physics Constraint Actor
UE - Simulation - Physics - Solver - Apr 12, 2022Waking both of a constraint's rigidbodies re-enables collisions that were disabled by the physics constraint You can also get this issue to occur by either shooting the two cubes around a bit, or by ...
A widget set in the Grid Panel reverts back to it's default size and position when compiled
UE - Editor - UI Systems - UMG - Apr 13, 2022A widget set to a specific row and column within a Grid Panel, that has been assigned multiple rows and columns, and then spanned across other rows and columns reverts to it's default position and s ...