Unreal Engine Issues

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, ...

Widget components and widgets in screen space are not the same color

Widget components appear to be affected by lighting. This causes differences in color between widget components and widgets that have been added to the viewport. ...

AI Perception Not Showing Up in Debugger

AI Perception does not seem to be showing up in the debugger. The same setup functioned as expected in 4.11.2 binary, but upon converting the project to 4.12 Preview 4 binary, no debug information w ...

SteamSockets not setup to handle Client/Session ID handshakes

Repro Rate: 3/3 This is a live issue where the customer claims that the SteamSockets implementaton is not setup to handle the new Client and Session Id setup that was introduced in 5.1. This issue ...