Unreal Engine Issues
Unreal Engine Issues
iOS ReplayKit isn't working in UE5.1+
UE - Platform - Mac - Apr 21, 2023In 4.27 & 5.0 when you press the in-app screen recorder button it would pop-up a msg about the user giving permission to allow the screen recording and then would start the recorder and save the mov ...
Fix rarely leaking Particle System Components
UE - Graphics Features - Jul 22, 2015User has found an issue in which Anim Notifies, spawning particle system components that cannot ever render will leak the particle system component. The user has a working fix but it's likely not i ...
"Error Provision not found" even though the provision is present and valid in 4.13.1
UE - Platform - Mobile - Oct 31, 2016A few users are reporting on the Answer Hub and in the Forums that they are getting the following error in their output logs: "Error Provision not found" even though the provision is present and va ...
Text overflows on Material_Properties sample 1.6
Docs - Samples - Aug 13, 2016In ContentExamples on sample 1.6 of the Material_Properties map, the text overflows the area given for it. ...
FName no longer equals FName_None when constructed with a trailing underscore and digits in range of 1-9
UE - Core - Systems - Apr 15, 2025When an FName is created with a trailing underscore and any number of digits in the range of 1-9 the trailing digits are used as the internal number value for the FName lookup. This results in the F ...
Merging Splines causes Engine to Crash in 5.1
UE - Engine Scaling - Streaming - Merge Actor - Dec 15, 2022Attempting to merge two spline actors causes the Engine to crash. This issue occurs with the Steps to Reproduce regardless if there are more branches added to the tree branch spline/enabled, and reg ...
UNetConnection::NotifyConnectionUpdated always sets MyConnectionId to 1
UE - Framework - Networking - Jul 28, 2026This looks to be due to an oversight in how the conditions are checked in NotifyConnectionUpdated, where the “&&” operator results in MyConnectionId always being set to 0 or 1:if (const uint32 MyCon ...
Android movie player doesn't work with ES 3.1
UE - Platform - Mobile - Jul 27, 2017Niether movie playback Startup Movies Play on ES3.1 ...
Cull Distance Volumes do not effect Blueprints or Skeletal Mesh Actors
UE - Graphics Features - Jul 31, 2014CHANGELIST: 2181118 BRANCH: UE4 https://udn.unrealengine.com/questions/166371/cull-distance-volume-bug.html DESCRIPTION: Cull distance volumes don't seem to cull blueprints or meshes inside a bluep ...
MRQ reports missing frames when rendering multiple cameras on a Sequencer camera track with Temporal Sample Count > 1
UE - CAPT - Color Pipeline and Rendering - MRQ - Feb 2, 2026If there are multiple cameras in the Sequencer camera track, everything works correctly when the Temporal Sample Count for anti-aliasing is set to 1. However, when it is set to 3, the following erro ...