Unreal Engine Issues
Unreal Engine Issues
Cook non-determinism when serializing UObject pointers pointing to garbage
UE - CoreTech - UObject - Aug 25, 2025There's a cook determinism issue in the way UObject unversioned serialization handles UObject pointers pointing to garbage. Depending on GC timing, it can either be skipped (as a property matching C ...
sphere collision with start and end points set to the same value return no hit objects
UE - Gameplay - Aug 29, 2016Sphere collision with start and end points set to the same value return no hit objects. Workaround Set the end vector to 1 away from the start vector (0,0,0 to 1,1,1, etc.) Regression (no) issue ...
GPU Particle Initial Color With Distribution Constant Curve Will Not Transition Between Points
UE - Niagara - Jan 24, 2019GPU Particles will only use the first point of an Initial color module with Distribution set to Constant Curve. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.222 CL# 4768593 ...
Network Prediction crash when smoothing service instance data is reallocated out from under FNetworkPredictionStateView
UE - Gameplay - Network Prediction - Apr 4, 2025Received a report from a licensee using Network Prediction Plugin and Mover. There is a strong likelihood of a crash occurring when using NPP's smoothing option and spawning new NPP-simulating ins ...
Going to an earlier point of a replay does not update to previous visibility state on an actor that was switched to not visible during demorec
UE - Networking - Jan 5, 2016Going to an earlier point of a replay does not update to previous visibility state on an actor that was switched to not visible during demorec. Reproduced in 4.9.2 binary and Main (//UE4/Dev-Main C ...
GetRandomReachablePointInRadius is displaying non reachable points when radius float values exceed 6000
UE - AI - Oct 31, 2018When creating an Actor, and placing them inside of a geometric obstacle. GetRandomReachablePointInRadius is giving only non reachable points. The behavior happens when we set our navigational mesh b ...
Point Lights Y-Axis Rotation Changed from 4.18 to 4.19
UE - Graphics Features - Jun 6, 2018Possibly related to [Link Removed]. This affects Static, Stationary, and Movable point lights when upgrading a project from 4.18 to 4.19.2 or Main (tested in CL 4101872). If you click the "Reset to ...
Crash occurs when after resuming from a Breaking Point that has been placed on an On List Item Object Set node
UE - Editor - UI Systems - Slate - Oct 13, 2022Tested in: //UE5/Release-5.1 CL22346211 Crashed with Assertion //UE5/Release-5.0 CL20979098 Crashed with Assertion Crash occurs when after resuming from a Breaking Point that has been placed on an ...
The "Project World location to Widget position" node does not return the correct screen position unless the widget's anchor point is set to the top left
UE - Editor - UI Systems - May 26, 2015When using a widget that has an anchor point that is not set to the upper left the "Project world location to widget position" node does not return the expected location on screen. ...
Entering 'Games App Id' for Google Play Services without configuring apk packaging first crashes the editor
UE - Platform - Mobile - Jun 12, 2015User reported that he was experiencing a crash when attempting to put in Games App ID in Android section of project settings. Note that this occurs only if the Configure Now button in the APKPackagi ...