Unreal Engine Issues
Unreal Engine Issues
Crash on stopping PIE after using DemoRec in PIE
UE - Networking - Jan 20, 2016Crash on stopping PIE after using DemoRec in PIE. Possibly related to [Link Removed] which must be fixed, but happens upon stopping PIE. Reproduced in 4.11.0 Preview 3 binary and Main (//UE4/Dev-Ma ...
[Quartz] - Playing a Force Inline SoundWave asset with PlayQuantized crashes editor
UE - Audio - Quartz - Aug 17, 2023Calling PlayQuantized on an asset set to Force Inline crashes editor:Assertion failed: SoundWaveDataPtr->GetLoadingBehavior() != ESoundWaveLoadingBehavior::ForceInline [File:D:\SMoyls_UE5_Release-5. ...
Second player's screen does not render in Split Screen on Android
UE - Platform - Mobile - Mar 21, 2019The second player's screen in a Split Screen multiplayer session on Android does not render. It remains completely black. This was also an issue prior to 4.15 but was fixed with [Link Removed]. The ...
Float Curve evaluation may yield completely wrong results due to floating-point precision issue
UE - Anim - Runtime - Oct 31, 2024Note: This is possibly related to [Link Removed]. For some inputs, function UE::Curves::WeightedEvalForTwoKeys() inside file "CurveEvaluation.cpp" can incorrectly return the value of the first key, ...
Undo function breaks local variables in Blueprint Function after compiling
UE - Gameplay - Oct 8, 2020Blueprint functions appear to correctly associate local variables when renaming the function. However when undoing a rename with ctrl-z the local variables appear to lose their association. Redoing ...
[GPU Lightmass] bake artifact w/ two actors of same static mesh
UE - Graphics Features - Jun 22, 2022As per a bug report from Pixomondo: if there are two static meshes in the scene and one has a rotation, it gets a GPULM bake artifact as if it is intersecting with the unrotated version of itself. S ...
Crash when launching a packaged project where a code class gets a reference to a Blueprint widget that contains an instance of a Blueprint struct
UE - Gameplay - Blueprint - Aug 3, 2017A packaged project will crash on launch if a code class uses ConstructorHelpers::FClassFinder to get a reference to a Blueprint Widget that contains a Blueprint struct variable. Disabling EDL in the ...
Dirty Actors in WP lose their actor folder in the outliner (and cause warnings) on PIE
UE - World Creation - Worldbuilding Tools - World Partition - Mar 20, 2023From Licensee: You can reproduce this in stock by doing the following:Make a new 5.1 project with a new WP map (it can be empty)Put some actors in some folders in the outliner and save them/reload ...
Restricted Gameplay Tags cannot be added
UE - Gameplay - Mar 15, 2024The Gameplay Tags settings have the option to set up restricted tags as described in the documentation. Prior to 5.3, the UI correctly supported creating new restricted tags as described in the old ...
Ensure triggered in FBoundsCacheElement::GetValue when adding ISM instances in Construction Script
UE - AI - Oct 8, 2025An ensure is triggered in FBoundsCacheElement::GetValue when adding instances to an InstancedStaticMeshComponent inside a Blueprint’s Construction Script. This occurs when the ISM component is navig ...