Max Angular Velocity Value Being Reset

UE - Gameplay - Jun 6, 2016

The value of Max Angular Velocity on a component is being reset after changing the value and compiling the blueprint. Found in 4.12 binary, reproduced in Main CL 2994701. Could not reproduce in 4. ...

State Machine Variable Type Icons Display in the Color White

UE - Anim - Runtime - May 4, 2022

Occurs 5/5 times State machine variable type icons all display in the color white.  Regression does occur - tested in //UE4/Release-4.27.2 EGL Live @ CL18319896 ...

OnRep functions do not fire on the Server when elements are added to an array variable marked as RepNotify

UE - Networking - Mar 17, 2015

OnRep functions do not fire on the Server when elements are added to an array variable marked as RepNotify. They do not fire at all when setting an array element with the Set Array Elem node. Proba ...

Remove Item Node Removes All Objects in an Array

UE - Gameplay - Blueprint - Nov 9, 2015

Getting an object from an array at a certain index and then using the Remove Item node causes the entire array to be wiped. Found in 4.10 Preview 4. Reproduced in 4.9.2 binary and Main CL 2752291. ...

Setting a value Material Parameter Collection to Material will cause crash

UE - Graphics Features - May 2, 2016

Adding a Material Parameter collection to a material, setting its value, then saving the material will cause a crash. This was only able to be reproduced on Mac and did not affect the Windows versio ...

Get Input Touch State produces incorrect vector position

UE - Gameplay - Input - Sep 25, 2018

Get Input Touch State produces incorrect vector position when using it on Android. Tested in 4.19.2 (CL - 4033788), 4.20.3 (CL - 4369336), 4.21 (CL - 4395058) ...

Docking tabs to the main viewport will hide other viewports that are not docked

UE - Editor - UI Systems - Slate - Mar 3, 2015

If any tabs are undocked from the main viewport and another tab is then docked to the main viewport it will hide any undocked tabs. This only appears to affect tabs that in the Menu > Window with ex ...

Compiling any material in UE 5.5.1 without ShaderCompiler JobCache results in a crash

UE - Rendering Architecture - Shaders - Jan 15, 2025

Compiling any material with r.ShaderCompiler.JobCache=0 causes ShaderCompileWorker to crash. Reproduction steps cause a crash during Editor startup, but this bug may affect other scenarios where mat ...

ShowDebug Overlapping Text

Tools - Apr 27, 2016

Using the showdebug commands during play results in overlapping text that is difficult to read. Found in 4.11.2 binary. Reproduced in 4.10.4 binary and Main CL 2852833. Regression? No, also occ ...

Gameplay Debugger Won't Open When Using US International Keyboard Settings

UE - Gameplay - Input - Nov 23, 2015

Using a keyboard with US International settings prevents the gameplay debugger from being opened when using the apostrophe key. Potentially a similar issue to [Link Removed]. Found in 4.10 binary. ...