Unreal Engine Issues

Inaccurate motion vectors when using different position binding in renderer

Even though the particles are not moving, and the velocity is zero, the output motion vectors are non-zero. This seems to only happen if using two sources of particle positions.  ...

Compilation error with Evaluate Chooser node when getting All Results from Subclass Of table

Trying to use the Evaluate Chooser node in the All Results mode with a chooser table that returns the Subclass Of type results in a compilation error ("Array of Actor Object References is not compat ...

In Editor, Blueprint resources are not freed up when the Blueprint is closed

It appears that the preview scene used to render thumbnails is not destroyed after a thumbnail is rendered, even after the blueprint editor is closed and GC is run. Also found in Release-5.4, CL: 31 ...

Instanced EditInlineNew Objects not correctly propagating to children and placed level instances

Instanced EditInlineNew objects are kind of broken right now and hard to make full use of. In addition to the notes above, there are some cases where you can't even assign new values into the base c ...

Error Saving Project When Adding an "InstancedStaticMeshComponent" to A Static Mesh Actor Blueprint

When trying to Save a Project after Adding an "InstancedStaticMeshComponent" to A Static Mesh Actor Blueprint, user experiences an Error Message: “…Graph is linked to private object(s) in an extern ...

[CrashReport] UE4Editor_BlueprintCompilerCppBackend!FEmitDefaultValueHelper::HandleInstancedSubobject() [blueprintcompilercppbackendvaluehelper.cpp:2148]

No user comments in crash group 2143 // We should always be the one creating an instance in this case. 2144 check(bCreateInstance); 2145 2146 // Dummy object tha ...

Window Size does not Change to iPhone 6 presets when in Standalone Game or Mobile Preview (PIE)

You cannot adjust the Window size to the iPhone 6 or iPhone 6 + preset Common Window Sizes in the Editor Preferences. Regression: this did not occur in UE 4.10 NOTE: This does not occur in New Ed ...

Crash Occurring in Standalone When a Loaded Sub Level Contains an Actor With a Child Actor Component

Standalone is crashing when a map containing a sub level that has an actor containing a child actor component is streamed in, or if the level is set to be always loaded. To be clear, this is not c ...

Enhanced Input System + FlushPressedKeys behave questionably together

changing localization does not change text in PIE

When switching localization for testing, text does not change language in PIE. ...