Unreal Engine Issues
Unreal Engine Issues
Linux: Assertion at splash screen when trying to open UE4Editor
UE - Platform - Linux - Mar 21, 2017I ran into this while looking to verify [Link Removed] at CL 3355923. I logged the issue I was verifying the fix for last night and have not updated anything locally, so the "OpenGL 4.3 not supporte ...
UMG Animations do not play while the widget is offscreen
UE - Editor - UI Systems - Jan 22, 2018Currently, widget animations are updated in UUserWidget's NativeTick. Widgets do not tick when they are offscreen (as intended), but as a side effect, animations are paused and will resume once the ...
Component default data can be lost for a non-nativized Blueprint class that inherits the component from a nativized parent Blueprint class.
UE - Gameplay - Blueprint - Sep 5, 2018This is a regression that was introduced by the fix for [Link Removed]. The fix makes an invalid assumption that instances of components whose archetypes are inherited by a non-nativized child Blue ...
Rotation of a constraint is not taken into account for limited range movement
UE - Simulation - Physics - Apr 9, 2019Rotating a constraint does not update its range of motion based off of angular limits. The user who reported this also mentioned that migrated constraints do not see this issue (eg: migrating a phys ...
NetStartup actors may receive old, unreliable multicast RPCs when becoming relevant again with replication graph
UE - Networking - Nov 15, 2022Unreliable multicast RPCs won't be processed for connections where the actor isn't relevant (this is checked in UNetDriver::ProcessRemoteFunction). However, UReplicationGraph::ProcessRemoteFunction ...
[Sequencer MRQ] Spatialized audio is not heard in MRQ renderings
UE - Audio - Sequencer - May 28, 2026Per customer case: [25102237 | Case | Salesforce|https://epicgames.lightning.force.com/lightning/r/Case/500QP00001V41PqYAJ/view] Audio that uses an Attenuation to set Spatialized Audio (just positi ...
Make/Break Struct node breaks for native structs after modifying the structure in a hot reload
UE - Foundation - Cpp Tools - Hot Reload - Apr 10, 2017Changing and compiling a custom struct in C++ will break behavior of Make/Break Struct nodes in blueprints if the blueprint is saved after the compile. Regression: No - blueprint fails to save afte ...
Save Data Does Not Delete After Actors in Sequencer are Deleted and File Size Continues to Grow
UE - Anim - Sequencer - Oct 9, 2017Link that the user included with their Answer Hub ticket: https://answers.unrealengine.com/questions/713209/levels-uneditable-editor-stuck-with-updating-asset.html The file size is not maintaining ...
"Get Sense Class for Stimulus" node doesn't return AISense class when using "Make AIStimulus" struct as input
UE - AI - Perception - Nov 11, 2020This issue was reported by an user. I reproed the issue and created this Jira ticket for the user. User was trying to to add values to the 'Stimulus' struct coming straight out from 'On Target Perc ...
"Consume pointer input" on Common User Widget does not work on iOS, FReply::Handled not respected
UE - Editor - UI Systems - Apr 29, 2024From a UDN, they also mentioned: Update: I added CommonUI to the test project to try the "Consume pointer input" setting. It behaves the same way as our custom input blocking widget in that the in ...