Unreal Engine Issues
Unreal Engine Issues
Anim State Notifies Don't Consistently Fire Begin/End Events for Looping Anim Sequences
UE - Anim - Runtime - Anim Blueprints - Jun 9, 2025If you have an Animation Notify State and set it up on an animation to start at the exact beginning of the anim sequence and finish exactly at the end (I have attached a picture of this). It doesn't ...
AnimNotify Issue with LevelSequencer Actor with URO
UE - Anim - Runtime - Anim Blueprints - May 19, 2025Sometimes AnimNotify does not fire when an animation is executed under the following conditions. 1. The CharacterMesh's AnimationMode uses UseAnimationAsset 2. CharacterMesh's URO is enabled (Enable ...
Linked graphs that are linked via post process anim bp BeginPlay can be lost on reinitialization of anim instance
UE - Anim - Runtime - Anim Blueprints - Dec 16, 2024Certain codepaths in USkeletalMeshComponent::InitializeAnimScriptInstance can cause linked anim graphs that are running in Post Process anim bps to be unlinked. The problem only occurs when the lin ...
Game thread anim task evaluation can happen on first frame update even when bTickAnimationOnSkeletalMeshInit is unset
UE - Anim - Runtime - Anim Blueprints - Nov 28, 2024The bTickAnimationOnSkeletalMeshInit should prevent a game thread update of the anim instance on the frame that a mesh is spawned. However, a bug in RefreshBoneTransforms is resulting in a game thr ...
GatherDebugData not setup for new animation nodes.
UE - Anim - Runtime - Anim Blueprints - Nov 22, 2024There are some gather debug calls not setup for new anim nodes, interrupting the gathering of the rest of the chain for the animation debug screens. OffsetRootBone OverrideRootMotion Steering DeadB ...
Placed AnimGetter nodes don't update their name even though their reference is renamed
UE - Anim - Runtime - Anim Blueprints - Oct 3, 2024Some animation node such as State Weight and Get Relevant Anim Time Remaining contains state name within in parentheses. But already-placed node does not update their name even thought the reference ...
BlendListByEnum assumes that enum values are sequential
UE - Anim - Runtime - Anim Blueprints - Aug 26, 2024FAnimNode_BlendListByEnum assumes that values within a custom enum type are sequential (ie. the index 0 = value 0, index 1 = value 1). But this is not true of all custom enum types, for example: U ...
Callback set with AddNativeStateEntryBinding() stops working after ABP compile during PIE
UE - Anim - Runtime - Anim Blueprints - Aug 15, 2024After compiling the Animation Blueprint (ABP) during Play In Editor (PIE), the callback registered with UAnimInstance::AddNativeStateEntryBinding() in NativeInitializeAnimation() stops functioning a ...
Anim Blueprint preview plays incorrect anim sequence after swapping sequence players
UE - Anim - Runtime - Anim Blueprints - Aug 14, 2024It seems that the debug skeletal mesh in the anim blueprint preview can end up playing the incorrect anim sequences. This happens when a sequence player, with the anim sequence specified via proper ...
OnlyTickMontagesAndRefreshBonesWhenPlayingMontages visibility option updates anim instance multiple times
UE - Anim - Runtime - Anim Blueprints - Apr 25, 2024The OnlyTickMontagesAndRefreshBonesWhenPlayingMontages setting added in 5.4 is broken. It only works because it unintentionally forces a second call to UAnimInstance::UpdateAnimation (via RefreshBo ...