Unreal Engine Issues

Animation Modifiers that contain a null Animation Sequence value cause the Engine to crash when applied to an Animation Sequence

When an Animation Modifier passes a null Animation Sequence value to an Animation Sequence the Editor will crash. This is a regression from 4.20.3 (CL-4369336). This was reported and tested in 4.21 ...

Crash when adding a streaming level to the world through Python

When using the Python plugin to add an existing level as a streaming level, the editor crashes. It seems that this happens regardless of what level is added or what the contents of that level are. A ...

check(!bPostTickComponentUpdate) fails triggered by ~FStaticMeshComponentBulkReregisterContext() and FD3D12DynamicRHI::ProcessInterruptQueueUntil()

Context: Some ActorComponents can schedule end-of-frame work which UWorld executes later in the frame in UWorld::SendAllEndOfFrameUpdates(). By-design it appears that it's not allowed to schedule mo ...

Material Editor Crash occurs on mathematical operation node receiving invalid input from a Texture Object

Copying a Folder in Sequencer and later Pasting it inside Sequencer is resulting in loss of Components

Copying a Folder in Sequencer and later Pasting it inside Sequencer is resulting in loss of Components. The pasted folder is not respecting the structure that was copied. This issue only happens on ...

Crash after Disabling Post Process Blueprint on a Skeletal Mesh

Changing the Anim Class in the Details Panel before Disable Post Process Blueprint can prevent the crash from occurring. Changing the Animation Mode does not seem to prevent this crash.  The conten ...

When Sequencer's Add Filter Menu>Keyed(U) is enabled, adding a Key to an actor that previously failed the Filter (had zero Keys) does not immediately include the Keyed actor in the filtered list (if fails FSequencerTrackFilter_Keyed::PassesFilter)

When Sequencer's Add Filter Menu>Keyed(U) is enabled, adding a Key to an actor that previously failed the Filter (had zero Keys) does not immediately include the Keyed actor in the filtered list (if ...

Converting a landscape to blueprint crashes editor

Converting a landscape to a blueprint immediately crashes the editor. Frequency: 2/2 ...

Crash When Renaming a Duplicated Collapsed Node Graph With a Period in the Name

A crash is occurring if you collapse a node and name the collapsed graph something that contains a period. The crash occurs if you copy and paste the collapse graph, and then attempt to rename it. I ...

Assigning FSoftObjectPath to null entry in Blueprint Trips ensure on Compile/Load

[Link Removed] Able to set default values for Sequence & Map variables for a Movie Pipeline Executor Job causing an Ensure & Crash. Repro Rate: 4/4 Tested this in //UE4/Release-4.27 @ CL#18319896 ...