Unreal Engine Issues

Code delegates duplicate function calls when owning actor is duplicated in the editor

If an actor that contains a delegate bound in code is duplicated after being placed in the level, the delegate for the duplicate will also trigger the delegate for the original as well. ...

Mentioning "_Validate" suffix in code comments to function names causes Compiler error

When mentioning the _Validate Suffix in code comment, Visual Studio compiler throws an error. ...

Lighting not rebuilding. SWARM: "Error: A 32 bit processes cannot access modules of a 64 bit process."

Material Usage Flags not triggering Source Control

Usage Flags are not correctly marking Materials as dirty when automatically setting and with using a Source Control method. Compact Repro Steps from User: "To reproduce: Create a entrance level th ...

Bluerpint nativization failed for calling TMap::Find function of a map container with an enum type key

Followings are nodes in the repro project. [Image Removed] Here's a generated code of the BPvoid ANewBlueprint_C__pf1010915279::bpf__NewFunction_0__pf() { uint8 bpfv__CallFunc_GetInt_NewParam ...

Non-nativized classes that implement a nativized interface class do not get interface methods called when invoked through a Blueprint function library.

UObjectBaseUtility::GetInterfaceAddress() fails due to an incorrect serialized value of the 'bImplementedByK2' property within the non-nativized class's Interfaces array on save. See support thread ...

LWC Function Usage View Mode shows unchanging results for Nanite meshes with different LWC usage

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When editing a Niagara module an error can occur if using non-module functions, even with a correctly set usage bitmask

When editing the module the call to FHlslNiagaraTranslator::HandleDataInterfaceCall has the usage "Module", so it treads the module as if that was its stack context, even though the module's usage b ...

Self Shadow casts shadow on itself

I'm not sure which way this one should go, but there is inconsistency with how Self Shadow works when compared to the Direcitonal Light or Point Lights. When Self Shadow is enabled on a Directiona ...

Crash in ProceduralMeshComponent when building lighting

Crash on build in editor with UProceduralMeshComponent 4.8 p2 ...