Unreal Engine Issues

SignedArchiveReader may request wrong number of chunk blocks

This problem is caused by an incorrect calculation of the number of chunks in the read request. Here is the workaround applied by the licensee : int64 FSignedArchiveReader::PrecacheChunks(TArray<F ...

Crash upon diffing Blueprint that was reparented when its previous parent has already been deleted

When attempting to diff a Blueprint that has been reparented when the previous parent no longer exists in the editor, a crash occurs. The crash is due to the editor attempting to reference the delet ...

SetDisableRetargeting does NOT work correctly for packaged project

For example in cutscenes, the users use FBoneContainer::SetDisableRetargeting to temporarily use a specific shared animation without retargeting. But the function does not work correctly. We can fi ...

Editor crashes when adding a parameter to a material when using Forward Shading and DX12

Setting the default RHI for Windows to DX12 and enabling Forward Shading results in a crash when adding a texture sample parameter to a material. Found in 4.22 CL# 5660361 and 4.23 CL# 6074473 Wor ...

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 ...

Editor crashes if Sequencer has keyframes for a variable that has changed

The Editor crashes if loaded sequence has keyframes for an actor variable that has been changed, instead of soft erroring out. This was reported and tested on 4.20.3 (CL-4369336). It was reproduced ...

[AI] Using a Reference Value for scoring in an EQS test produces the opposite effect of its tooltip.

An EQS Query scores the tests using reference values opposite of how the comments and tooltips describe. It will score items closest to the referenced value lower than those further away, but the ex ...

Geometry Collection crashing BP Simulation when set to enable Physics via Event Graph

Reproduced 3/3 times, issue also occurs in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed NOT a Regression. Issue does not occur when user Simulates in level viewport, nor when geometry collecti ...

IOS deviceCrash when input Korean Charactor on EditableTextBox

Pasting an element into a Widget Blueprint hierarchy causes a crash

Pasting an element into a Widget Blueprint after removing the canvas panel will result in a crash.  This has been tested with the border and button elements. This issue is occurring in //UE5/Releas ...