Unreal Engine Issues

Setting Fullscreen Mode to "Fullscreen" results in Crash when using 4.23 from source

Changing the screen settings to Fullscreen through code or blueprints results in a crash. This only happens in the source version of 4.23 and does not occur in the binary version of 4.23. I have att ...

Using a Blutility to modify an Actor in a Streaming Level doesn't make it dirty

Using a Blutility to modify an Actor in a Streaming Level doesn't make it dirty and prompt it to be saved. This was reproduced and tested in 4.19.2 (CL-4033788), 4.20.3 (CL-4369336), 4.21 (CL-44358 ...

20 FPS performance drop between 4.7.6 and 4.8 on devices rendering Metal only

User reported a considerable performance drop on iOS between versions 4.7.6 and 4.8. I was able to reproduce this perf drop using the steps he provided. ...

Editing ChildActorComponents on a Parent BP can corrupt a Child BP's state.

Editing the Child Actor Class of a Child Actor Component owned by a Parent BP can corrupt the Child BP's state. This seems related to known serialization issues, where changing a Parent's Property ...

FMediaFoundationMovieStreamer::Init() returns true even if the movie could not open.

Creating External Curve for a function's local struct variable causes editor to crash

Defining a FRuntimeFloatCurve inside a code based struct causes the editor to crash if the struct is added as a local variable to a blueprint function and the "Create External Curve" button is press ...

Android sessions do not appear in Session Frontend

Destructible mesh does not trigger overlap event for objects/pawns that are not moving

DESCRIPTION: When using the generate overlap events for a destructible mesh with Static Mesh or skeletal mesh that is not moving will not generate an overlap event to be triggered. So long as the me ...

A replicated Timeline's Finished output does not fire on the Client if the Server changes the Timeline Length to a shorter duration

A replicated Timeline's Finished output does not fire on the Client if the Server changes the Timeline Length to a shorter duration. Test project attached. Reproduced in 4.9.2 binary, 4.10.2 binar ...

[CrashReport] UE4Editor_Renderer!FSceneRenderTargets::GetGBufferResourcesUniformBuffer() [scenerendertargets.h:408]

This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Assertion failed: IsValidRef(GBuff ...