Stacked shots will evaluate both sub sequences instead of just the topmost

UE - Anim - Sequencer - May 19, 2021

Overlapping shots will evaluate all shots instead of the topmost one. ...

Is hovered for a scroll box does not switch back to false when no longer hovering

UE - Editor - UI Systems - Feb 24, 2016

If the user uses the is hovered node with a scroll box, the node will return true no matter what once the scroll box has been hovered once. ...

Rarely, unmodified Niagara will cause diffs and bloat the patch.

UE - Niagara - May 3, 2022

Attached is a project that picks up Niagara from the content sample. The probability of reproduction is about 1/10. The simpler the project, the lower the reproduction probability. I am attaching ...

Max Draw Distance Can't Be Set Again Until Set Back to Default

Max draw distance cannot be changed to a higher value than it is first set, until you reset it back to default. Working as expected in 4.19 CL# 4033788 Found in 4.20 CL# 4369336, 4.21 CL# 4516095, ...

While using Rootmotion with blendout, the velocity will always fallback to 0.

UE - Anim - Gameplay - Apr 19, 2019

We skip CalcVelocity for CharacterMovement while HasAnimRootMotion, and we do ExtractedRootMotion.MakeUpToFullWeight() anyway.  This caused problem that when we blend out a rootmotion anim, it will ...

Restore state on animation in level sequence will stop all montages

UE - Anim - Sequencer - Feb 12, 2020

It looks like UnbindFromSkeletalMeshComponent stops all montages. This is called when the animation section restores its state.  https://udn.unrealengine.com/s/question/0D52L00004lun3ySAA/restore ...

Material Function with Texture Size Texture Property will cause a Crash

UE - Graphics Features - Apr 5, 2016

By accessing the texture property for texture size will cause a crash. Attached image for material graph. Tested in: 4.10.4 Texture Size Texture Property did not exist 4.11.- CL-2927265 4.12 Dev ...

Importing manual LODs in the Static Mesh Editor on Linux will freeze the editor

UE - Platform - Linux - Oct 21, 2015

When importing a LOD manually in the Static Mesh Editor the editor will freeze indefinitely. ...

Entering nine or more digits into a numerical field will change the value upon confirmation

Tools - Sep 9, 2016

If a value with nine or more digits is entered into a numerical field the number the last few digits will be converted to another number upon accepting input. This happens in blueprints as well as ...

Vulkan leaks memory when opening and closing windows

UE - Rendering Architecture - RHI - Nov 22, 2019

As described here: https://udn.unrealengine.com/questions/532725/index.html (1) Start Prebuilt Vanilla 4.23.1. with Vulkan enabled (2) Create a new project (3) Drag and drop the Sphere from “modes ...