Unreal Engine Issues

Lyra: OnSpawn player abilities can fail to activate on client in networked sessions

A licensee who built their game on top of Lyra has reported that OnSpawn abilities, which is a feature provided by the LyraGameplayAbility base class via its ActivationPolicy, have a chance of faili ...

Debug display of TargetingSelectionTask_AOE with cylinder is unnaturally tilted

The following code fixes the tilt : void UTargetingSelectionTask_AOE::DebugDrawBoundingVolume(const FTargetingRequestHandle& TargetingHandle, const FColor& Color, const FOverlapDatum* OverlapDatum) ...

GAS: Initial OnRep_SpawnedAttributes from DefaultStartingData clears attribute values for already replicated ActiveGameplayEffects

Context The property 'DefaultStartingData' in AbilitySystemComponent can be configured from blueprint to spawn default attribute sets. This happens OnRegister. For runtime spawned actors like pawns ...

GAS: Creating an UGameplayEffectUIData blueprint will lead to a failed Data Validation

The logic for data validation on UGameplayEffectComponent expects it to be owned by a UGameplayEffect. Any Blueprint derived from UGameplayEffectUIData (child of UGameplayEffectComponent) fails this ...

GAS: Duration GameplayEffects applying same GameplayCue tag will on authority end all on-going GameplayCueNotifies when first cue expires

When multiple duration GameplayEffects apply a GameplayCue with the same tag, the network authority game instance (standalone & servers) will remove all GameplayCues with that tag from the AbilitySy ...

GAS: Crash on resizing FActiveGameplayEffectsContainer::AttributeValueChangeDelegates while executing a contained delegate

Game code can register listeners to when a GAS attribute changes value, for example by calling: AbilitySystemComponent->GetGameplayAttributeValueChangeDelegate(SomeAttribute).AddLambda(); These de ...

JumpForce replicated ability task not always cleaned up properly

See [Link Removed] for original report.  UAbilityTask_ApplyRootMotionJumpForce has a slightly different flow than other Root Motion Source ability tasks. It is the only one that allows EndTask to b ...

Lyra: GA_Melee uses disallowed NetMulticast RPC for melee impact sound

The melee gameplay ability GA_Melee uses a NetMulticast RPC which isn't allowed and causes a blueprint validation error: GA_Melee.uasset: Gameplay Abilities are not replicated to Simulated Proxies ...

Reference to GameplayTag isn't resolved correctly if the blueprint is loaded before the GameplayTag is registered

Gameplay Tag Query on Actor Component cannot be editted normally on instances

A GameplayTagQuery in an ActorComponent cannot be properly edited on instances of an actor with said component. There is a workaround, but the issue makes editing Tag Queries rather annoying, doubl ...