Unreal Engine Issues

Clear FileItem cache when deleting files to prevent stale cached data

Should be straightforward, the UDN that reported this deletes all files using the FileItem interface so they can clear out the entry from the cache dictionary but there may be a way to just invalida ...

ProcessPriority performance consideration with Generation 12 Intel CPUs

It has been noted that the default BelowNormal process priority set in UnrealBuildTool is not handled well with the Gen 12 Intel CPUs as processes are only scheduled on the E-Cores which causes degr ...

Crash occurs when selecting Reset this Property to Default Value in the Class Settings of a new Child Animation Blueprint

This is a Regression. Tested in //UE5/Release-5.0 CL20979098 - "None" is not an option for the parent class and the "Reset this Property" is not initially there. Crash occurs when selecting Reset t ...

AnimNotifyState with the same class, but different content at the same time will only one be triggred

UDN Case : https://udn.unrealengine.com/s/question/0D54z00008G3EmwCAF/two-c-based-animnotifystate-with-the-same-class-but-different-content-at-the-same-time-will-only-one-be-triggred?fromCase=1 ...

UWorld::InternalGetNetMode uses DemoNetDriver, leading to unexpected NetMode being returned

UWorld::InternalGetNetMode will use DemoNetDriver->GetNetMode() if there is a DemoNetDriver, resulting in NM_ListenServer being returned when recording a replay. This seems to have been originally a ...

[Alias] Reimport of a StaticMesh failed

The user suggest to add the option "Only New Meshes" ...

Linked Anim Layer node can become stuck in a single state when attempting to change the Layer

When swapping Layer settings between various Animation Layers on a Linked Anim Layer node, the node can become stuck in one state. The node will become stuck in the Linked Anim Layer state and canno ...

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 ...

Geometry Collection Cache Mode recording that has shattered on the ground shows that Collection Freeze when switched to Play and simulating again

Cache Mode: record seems to simulate fine, in Cache Mode: Play, the object does not simulate fracturing Repro Rate: 5/5 ...

Editor asserts when deleting a morph target from a skeletal mesh