Unreal Engine Issues

Crash when loading Anim BP after undoing and saving "Use Shared Rule" in state machine

Reported by UDN  [Link Removed] From Slack discussion: It seems that undo-ing the transaction in UAnimStateTransitionNode::UseSharedRules, leaves the outer graph (UAnimationStateMachineGraph) wit ...

Latent Blueprint Functions has incorrect linkage when the FLatentActionInfo is the first argument

When you create a latent function in C++ with the FLatentActionInfo first it will incorrectly set up the linkage for the latent info such that it gets linked to the incoming execution pin of the fun ...

Crash when recombining Value Pin after swapping Target Wild Card pin from a Vector2D to a Vector on a Set By-Ref Var node

This is not a regression. Tested in //UE4/Release-4.27 CL18319896 Crash when recombining Value Pin after swapping Target Wild Card pin from a Vector2D to a Vector on a Set By-Ref Var node.  ...

Large distant objects lose skylight lighting

[CrashReport]UnrealEditor-DatasmithImporter!FDatasmithImporterHelper::ImportInternal(UFactory *) [DatasmithImporterHelper.cpp:218]

Generated from CrashReporter ...

[Quartz] Play Quantized Crashes When Played On An Audio Component Spawned With 'Persist Across Level Transition'

There's a crash when "Play Quantized" is used on an Audio Component that was constructed via the functions "Create Sound 2D" or "Spawn Sound 2D" when the option 'Persist Across Level Transitions' is ...

Replacing actors during LevelInstance inline editing applies incorrect transforms

When you finish editing a level instance, the actor is converted from the world position to the local position of the level instance, but if you replace the actor, the conversion process is performe ...

Material Editor Assertion Crash When Collapsing Material Attributes

Collapsed material attribute nodes cause an editor assertion crash in the material editor when viewed or opened. Assertion failed: (Index >= 0) & (Index < ArrayNum): Array index out of bounds: 0 fr ...

Changes to AActor::SetReplicates caused Role/RemoteRole replication fix to regress

There was a recent bug report that matched the description of some older cases (see linked UDN). The issue raised in those cases, [Link Removed], had been fixed, but the recent question seemed to in ...

Reimporting FBX imported with Import Into Level does not maintain the changed material.

If you import by drag & drop without Import Into Level, the material will be maintained even if you change it. This is because FFbxImporter::ReimportStaticMesh() sets ImportOptions->bImportMaterial ...