Unreal Engine Issues
Unreal Engine Issues
Sequencer: Skeletal Animation with montages can cause blending issues when re-playing the same sequence on the same character
UE - Anim - Sequencer - Oct 1, 2024The code in MovieSceneSkeletalAnimationSystem.cpp storages montage data on a per skeletal mesh component, per section basis. This (and a few other bits of logic) cause issues for external UDN user w ...
Animation Modifiers that contain a null Animation Sequence value cause the Engine to crash when applied to an Animation Sequence
OLD - Anim - Nov 14, 2018When an Animation Modifier passes a null Animation Sequence value to an Animation Sequence the Editor will crash. This is a regression from 4.20.3 (CL-4369336). This was reported and tested in 4.21 ...
No output pin for created actor on "Create Level Sequence Player"
UE - Anim - Sequencer - Jun 7, 2017No output pin for created actor on "Create Level Sequence Player". This originally spawned from a licensee looking for a way to set the "Sequence Player" to a different sequence, but it also showed ...
Sequencer will not play Blendshape (Morph Target) Animations while in Realtime
UE - Anim - Sequencer - Mar 16, 2016An Animation Track that references a Blend Shape, Morph Target, Animation will not play when you play from Level Sequencer in Editor unless you turn off real time. Also it seems if Realtime is turn ...
Sequence with restore state set is causing a "Fatal world leaks detected" crash
UE - Anim - Sequencer - May 14, 2025We recently had a few occurrences of crashes caused by a "Fatal world leaks detected" error when unloading a level (in a packaged game and in editor). I tracked down what was keeping a references t ...
Sequencer Export to FBX file framerate is always 30fps, regardless of playback rate in Sequencer
UE - Anim - Sequencer - Apr 24, 2020This issue can cause problems for developers who are operating at framerates that aren't 30fps (eg 24). In Sequencer: [Link Removed] In Maya: [Link Removed] ...
Crash when playing a other Level Sequence inside a Spawnable Actor registered with Level Sequence
UE - Anim - Sequencer - Feb 17, 2021This issue crashes on exit when playing a other Level Sequence on an Event in a Spawnable Actor. Also this problem doesn't occur in 4.25. ...
The 'Add New Key' button does not function within the Actor Sequence Editor within an object that has the Actor Sequence Component.
UE - Anim - Sequencer - Jul 26, 2018The Actor Sequencer Timeline appears to not be able to correctly recognize the variables manipulated within the viewport. Thus, when attempting to add a keyframe after moving a component, within the ...
Sequencer - When a subsection has negative play rate, any nested sub-subsections fail to evaluate
UE - Anim - Sequencer - Jul 3, 2025Consider a sequence hierarchy with more than two layers. If the top-level sequence uses a negative timescale on a sub-sequence, the contents inside it animate as expected, but any nested sub-sequenc ...
Anim Time Ratio Doesn't Factor In Pin Sequence
OLD - Anim - Aug 12, 2015In a transition rule, the time assessed in "Time Remaining Ratio" Node does not include/factor time from the Pin Sequence of the animation node. For instance, if the original animation is 20 frame ...