Launching Android project to device results in Assertion Failed: AsyncLoading.cpp, Line 3710

UE - Platform - Mobile - Aug 31, 2020

After updating to 4.25.1 from 4.25 Packaged Android game crashes constantly with objects added to the map 4.25 Packaged game did not crash (editor did a lot but glad thats fixed in 4.25.1) Empty map ...

Duplicate level collections not being respected by UGameEngine::NetworkRemapPath

UE - Networking - Jan 5, 2021

When NetworkRemapPath was refactored in 4.26 to support replay connections via the rep graph, the check for duplicate level id on the driver was lost in the new code path. This causes the demo driv ...

Combobox navigation does not work consistently

UE - Editor - UI Systems - Jan 22, 2021

Navigation on combo box widgets will sometimes fail until the combo box close button is pressed, despite it not being open. This appears to be related to accessibility features added in CL# 13258546 ...

ProceduralMeshComponent only supports 4 out of the possible 8 UV channels

UE - Graphics Features - Feb 4, 2021

Licensee reports that Procedural Mesh Component is apparently limited to 4 UV channels, which indeed appears to be the case (e.g. UProceduralMeshComponent::CreateMeshSection arbitrarily processing 4 ...

SWidget: Add support for ScrollBox in GlobalInvalidation mode

UE - Editor - UI Systems - Slate - Sep 1, 2020

SScrollBar SScrollBarTrack SScrollBorder SScrollBox ...

Update warning in FActiveGameplayEffectsContainer::ApplyModToAttribute to consider batching

UE - Gameplay - Gameplay Ability System - Feb 19, 2021

The ModcallbackData won't be consumed while applying stacked Gameplay Effects if the updates are being batched. This triggers a false warning in FActiveGameplayEffectsContainer::ApplyModToAttribute. ...

Fbx animation re-import using UAssetImportTask in python will not use options

UE - Editor - Content Pipeline - Import and Export - Mar 5, 2021

Anim sequence re import factory is not overriding correctly the settings when we pass the override UFbxImportUI asset. It still use the original import data ...

Problems in skeletal mesh merge

UE - Editor - Content Pipeline - Asset Build - May 10, 2021

There are a few issues a licensee has found with the skeletal mesh merge operation. See the UDN for more details and the proposed fixes. Note, the issue with the cloth merge is already logged in a ...

Groom bound to GeometryCache is unstable

UE - Editor - Content Pipeline - USD - Aug 10, 2021

This issue seems to occur only in 4.27 with DX12. Did not repro in 4.27 with -dx11, nor in UE5 DX11/DX12. ...

Changes to Material Instance Parent don't appear to propagate to child instances if the child instance's editor window is open

UE - Rendering Architecture - Materials - Aug 16, 2021

It looks like this occurs when the grandchild instance window is open. If you close and reopen the Grandchild's window the parameter appears as expected. I've attached a project with the setup step ...