Unreal Engine Issues

UPrimitiveComponent mouse events when underneath Slate widgets not correct

Licensee is adding a widget to the viewport overlay via AddViewportWidgetContent(). The widget receives mouse input when hovered. They return unhandled from all their widget's onmouse functions and ...

Crash occurs selecting play in Vulkan Mobile Preview without sdk installed

Was attempting to repro [Link Removed] in //UE4/Main when I hit the following crash ...

Chaos Fields: LS_MasterField continuously creates components every frame and never cleans them up

While active and ticking, the built-in FS_MasterField actor instance continuously creates several new components every frame, which are never cleaned up until the actor is destroyed. This can happen ...

TMap Contains Node Returns False Incorrectly Under Specific Circumstances

The Contains node doesn't return an existing row from a data table under specific circumstances. This didn't occur when the struct the data table is based on was made via blueprints or there are mor ...

Switching a code project created in a source-built Engine to use the binary Engine results in files being deleted from the binary Engine installation

If a code project is created in an Engine built from source code, and then it is switched to use a binary Engine installed by the Launcher, building the project in Visual Studio will result in numer ...

[CrashReport] UE4Editor-Engine!FPrecomputedVolumetricLightmapData::ReleaseRHI() [PrecomputedVolumetricLightmap.cpp:303]

Crash in GameplayTag Editor Widget when editing array of tags on a component

Editing an array of gameplay tags on a component belonging to an actor instance can lead to a crash. There are inconsistencies with how the Gameplay Tag Editor widget behaves:Array of gameplay tags ...

Potential Memory Leak when frequently terminating and re-initializing FConstraintInstance

From User: When frequently terminating and re-initializing the FConstraintInstance, there appears to be a leak when cleaning up the disabled joint, which leads to an ever growing list that gets sort ...

Alpha channel is not working on drag and drop function

When using the drag and drop function in UMG on an image with an alpha map the background will show up as black instead of translucent. ...

Need addElement and addElements to allow single insertion instead of to all elements with matching tag

Since multiple dict tags can be in a plist, not just the top level, need to be able to specify to only insert once. Adding an optional once="true" attribute to these commands in UPL will allow this ...