Unreal Engine Issues

HTTP If-None-Match response code is incorrect on Macintosh

Macintosh implementation for HTTP requests handle If-None-Match against ETags differently than Windows implementation. ...

Crash when attempting to change the parent of a material instance constant through editor scripting

The built-in class "UMaterialEditingLibrary" provides various editor scripting functions related to creating and editing materials and material instances. One of these functions, UMaterialEditingLib ...

DLC Package content isn't recognized when using RequestAsyncLoad

Attempting to load dlc assets with RequestAsyncLoad function results in the assets not being recognized. ...

Changing the state of a PrimitiveComponent->BodyInstance while SetSimulatePhysics(false) updates the game thread but does not update the physics behavior

Changing the state of a PrimitiveComponent->BodyInstance while SetSimulatePhysics(false) updates the game thread but does not update the physics behavior. In the repro project provided (see addl in ...

iOS Shipping Build using std::thread crashes on launch

A user is reporting that using the following code in a GameMode class causes shipping iOS packages to crash on launch:void ANOGSSDKGameModeBase::StartPlay() { std::thread([](){ std::clog << "THRE ...

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

Invalid access location compressing a BC6h texture in the editor

Large texture crashes during Oodle compression with "-stompmalloc". It appears to be an internal Oodle error. Also tested on //UE5/Release-5.5/, CL: 37463908 ...

App crashes when executing 'Export to Disk' node on Android

Regression is unconfirmed ...

Crash on exit PIE when playing with more than one player on Linux

When playing in non-single player game in the editor (either set # players or check dedicated server checkbox), the editor will crash when the play session ends. Regression: Yes - editor does not c ...

Opening a widget blueprint on Linux causes editor to crash

The editor crashes when attempting to open a widget blueprint. ...