Unreal Engine Issues

Widget Component Variable can not be changed to Public with Instance Editable

This is not explicitly a regression from 5.0.3. In 5.0.3 the component variable is set to public with instance editable by default and can not be changed. Tested in //UE5/Release-5.0 CL20979098 Any ...

The process may not return to the root node after the Wait Task is completed.

If the Wait Task is completed for the first frame, it may not return to the root node even after Finish. This can be avoided by increasing the wait time of the Wait Task (see CaseOK.mp4). When this ...

Volumetric Cloud + Sun ghosting artefacts around a static cube

Video of the issue here - [Link Removed] 4.27 and 5.0 seem to display slightly different outcomes. In 5.0 the sun only appears very close to the cube, whereas in 4.27 is can appear a bit further ou ...

Fix up IOS errors calling UI API from non-UI threads

Precomputed AO Mask renders with value of zero after building lighting

Regression: Tested in UE5/Release-5.0 at CL 20979098, this issue does not occur so it is a regression.  This issue occurs in 5.1 for both normal light building and GPU Lightmass building. In 5.0 th ...

Editing an instanced variable that is nested in two other instanced variables causes a crash

If a user edits a instanced variable which is nested inside two other instanced variables in blueprint editor, a crash will occur ...

GPU Timeout when using a large scale Landscape and Water Body Ocean

Regression: Tested in //UE5/Release-5.0, this issue does not occur so regression is yes. The GPU Timeout only occurs in UE5/Release-5.1, as recreating this issue in previous versions of the editor ...

Niagara Parameters window resets when clicking in a Scratch Module

Regression: The UI for the Parameters window in a Niagara System is different from UE5/Release-5.0 to UE5/Release-5.1, so the issue cannot be replicated in Release-5.0 This issue occurs when going ...

Mesh from attached USD fails to import

UDN customer reported this issue: Using legacy USDImporter, the attached USD throws these ensures ensure(Primvar.Get(&UVs, Options.TimeCode)); ensure(Primvar.GetIndices(&Indices, Options.TimeCode) ...

USD Stage Import - Spawned actors by USD importer are not saved in level

we ran into an issue with USD Importer plugin for Unreal 5.2. When you import a USDStage with the "actors" import option - which respawns the newly imported actors into the current level.  However, ...