Migrating a blueprint based on a custom class breaks after migration

UE - Gameplay - Blueprint - Sep 21, 2015

When a blueprint that is based on a custom class is migrated from one project to another the references to the original class are held. This means that the blueprint is unusable in the new project, ...

Updating project to 4.12 corrupts Additive AimOffset thumbnail, causing log spam

OLD - Anim - Jun 6, 2016

Updating project to 4.12 corrupts Additive AimOffset thumbnail, causing log spamLogAnimation:Warning: Setting an additive animation (Owen_AimOffset) on an AnimSingleNodeInstance is not allowed. This ...

Static Mesh 's Light Map Coordinate Index set to 4 and execute a light build, the result will be incorrect.

UE - Graphics Features - Oct 1, 2018

Light Map Resolution is set to a small value (4 or 8), it will build normally. ...

Calling "GetCameraImage" rapidly ~10 times causes ARKit camera feed to stop updating

UE - Platform - XR - Nov 8, 2018

If you call the "GetCameraImage" function rapidly ~10 times, it causes the ARKit camera feed to stop updating.  Waiting for awhile or tapping some more seems to bring it back.   Tested on macOS H ...

Crashes when copying an array of actors that implement an interface into an array of interface references

UE - Gameplay - Sep 17, 2019

When assigning an array of actors that implement a specific interface to an array of the specific interface the engine crashes. This doesn't happen if the actor array is put through a for each loop ...

Cull Distance Volumes Affecting Actors After Being Deleted

UE - Graphics Features - Oct 7, 2019

Cull Distance Volumes Affecting Actors After Being Deleted. Found in 4.22 CL# 7053642, 4.23 CL# 8386587, and 4.24 CL# 9428115 ...

Animations are not recorded correctly when "Save Record Assets" is enabled.

UE - Anim - Sequencer - Jul 21, 2021

If I disable "Save Record Assets", all animations are recorded. I have checked the implementation of bSaveRecordedAssets, but I am not sure if this is the intended implementation. ...

GPU Lightmass and HLOD not working

UE - Graphics Features - Nov 4, 2022

(Enduring Games) Conversation with customer includes test project within which the config changes are also present for review. ...

Network Prediction Insights tool checks/crashes with trace data from a multiplayer PIE session

UE - Gameplay - Network Prediction - Mar 27, 2024

Loading a trace in Insights that has Network Prediction channel data from a multi-client PIE session will hit a check and crash the Insights tool. ...

Editor Crash When Using FRequestPlaySessionParams GlobalMapOverride To Load World Partition Map

UE - World Creation - Worldbuilding Tools - Data Layers - Dec 6, 2024

The licensee has been using a custom CVAR to launch directly into PIE for a world partition level. Since updating to 5.4, this now causes an editor crash. The main factor appears to be whether or no ...