Crash when adding a streaming level to the world through Python

UE - World Creation - Worldbuilding Tools - World Composition - Aug 3, 2021

When using the Python plugin to add an existing level as a streaming level, the editor crashes. It seems that this happens regardless of what level is added or what the contents of that level are. A ...

TriggerMontageEndedEvent will clear queued notifies for all instances of a montage

UE - Anim - Runtime - Jul 29, 2021

When a montage finishes and TriggerMontageEndedEvent is called, all queued notifies for that montage are cleared. However, this assumes that there is only one instance of the montage active at any ...

Buoyancy is broken in UE5: even BP with Cube SM component (mass is 1kg) and default Buoyancy Component with one default Pontoon falls on bottom of lake

UE - Simulation - Physics - Jul 26, 2021

Shorter steps:Steps 1-8 from Steps to reproduce (create level with water body)Find BP_BuoyancyExample in Content Browser (Engine>Plugins>Water Content>Blueprints)Place BP_BuoyancyExample above the w ...

If enable Preview Slot of non-default slot in AnimMontage, AnimNotify of AnimationSequence does not run.

UE - Anim - Runtime - Jul 15, 2021

The AnimSingleNodeInstance used in the AnimMontage preview does not consider multiple Slots. The following is a correction code. void UAnimSingleNodeInstance::SetAnimationAsset(class UAnimationAsse ...

Oculus Quest Link with OpenXR fires action events multiple times when multiple action events are bound to the same key

UE - Platform - XR - Jul 14, 2021

From a developer: If the same key is mapped to N action events all the mapped events fire N times. This issue only exists with the OpenXR plugin enabled and does not occur for any keyboard/mouse i ...

Mobile Previewer: Content Scale Factor 0 Issues

UE - Platform - Mobile - Jul 13, 2021

There are several reported issues with Save Zones displays in the mobile previewer when the Mobile Content Scale Factor is set to 0.  When MobileContentScaleFactor is set to 0 a couple things hap ...

Mobile Previewer: Safe Zone Invalid Until Window Resize

UE - Platform - Mobile - Jul 12, 2021

When the Mobile Previewer loads, the Safe Zone widget is not working properly at startup, and requires a window resize to update to the correct Safe Zone. ...

Android: FTraceAuxiliaryImpl::WriteToFile Fails to Create Absolute Path

UE - Platform - Mobile - Jun 23, 2021

A licensee has reported that the functions FTraceAuxiliaryImpl::WriteToFile, and find IFileManager::ConvertToAbsolutePathForExternalAppForWrite do not seem to be working properly for Android, as the ...

When creating an asset from an Emitter with a scratch module, changes to the new module will not propagate

UE - Rendering - Niagara - Jun 21, 2021

A scratch module made in an emitter, will not reflect the changes of its new parent when an asset is crated from the emitter. ...