MS_VertexAnimationTools_MorphTargets are not deforming and reforming

UE - Graphics Features - Sep 20, 2017

The Material should be contracting and expanding if it is working correctly, but after version 4.16 it is not. Instead it is solid in appearance in the material editor viewport. Below I have linked ...

Once an actor channel is closed by NetCullDistance, root motion movement synchronization stops working

UE - Networking - Jul 12, 2021

Properties that uses DOREPLIFETIME_ACTIVE_OVERRIDE (ex. RepRootMotion ) will also skip replication when an actor channel is newly opened. This means that if the variables on the server side do not c ...

Trying to diff previous versions of Blueprints using the Git plugin currently fails.

UE - Gameplay - Blueprint Editor - Aug 11, 2016

Diffing a Blueprint does not currently work when looking at previous commits. The diff appears to be looking at pointer files instead of the actual Blueprint files themselves. When using the Git LF ...

Engine\Build\IOS includes an expired certificate

UE - Platform - Mobile - Jan 2, 2019

\Engine\Build\IOS\AppleWorldwideDeveloperRelationsCA.pem is out of date. This causes a warning to appear when submitting app.  Workaround: Install latest WWDR ( https://answers.unrealengine.co ...

Setting a variable to private after making changes in a child blueprint will retain changes by prevent further access

UE - Gameplay - Blueprint - Sep 22, 2017

When declaring a variable to be private, any instances of that variable being changed in child blueprints (before hand) will remain as they were before the variable was declared as private. However, ...

Mobile Preview - Custom Stencil 4.23 Regression

UE - Platform - Mobile - Oct 25, 2019

Regression when using custom stencil with in-editor mobile preview. This does NOT reproduce in MAIN at CL 9730599 ...

Instigator is not set properly in Lyra health change callbacks

UE - Content - Sample - Mar 17, 2023

LyraHealthComponent has an OnHealthChanged callback that is executed whenever a character takes damage. One of the parameters is Instigator, but that is never set properly in the current version of ...

Odd behavior in Lyra when a key is down and focus is received back on the player from UI with gamepad buttons

UE - Gameplay - Input - Jun 29, 2023

This is only happening with gamepad buttons it appears. This is likely not Lyra specific, but has something to do with how the state of gamepad keys are being evaluated. I think that it may be becau ...

Map placed actor binding to another actor's Event Dispatcher (multicast delegate) results in duplicate bindings after blueprint recompile

UE - Framework - Blueprint - Apr 17, 2025

Context Blueprint actors placed on the map can bind to another actor's event. If an ActorB has a reference to ActorA, it can bind to an event dispatcher in A by creating an event node in ActorB's e ...

When running multiple clients in PIE the second player's inputs become toggled every tick when setting Input mode Game only on tick

UE - Editor - UI Systems - Slate - Jul 9, 2015

A user has found that setting input mode to game only on tick will cause the client in PIE to toggle their inputs on and off every tick. If this test is run with a single player the inputs are const ...