Unreal Engine Issues

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 ...

Attempting to generate project files on Linux fails if project path has spaces

If the project's file path contains a space, attempting to generate project files fails because the file path does not preserve quotes. UnrealBuildTool Exception: ERROR: Directory '/home/doug/Docu ...

Fbx importer create unused material

Crash when opening the viewport tab of an actor containing a widget component with "Draw at Desired Size" set to true

Crash when opening the viewport tab of an actor containing a widget component with "Draw at Desired Size" set to true ...

Lightmap Coordinate Index is not automatically set to 1 on import any longer with lightmap UV

When importing a static mesh with a second UV channel setup for the lightmap the second UV is no longer being automatically assigned as the lightmap coordinate index. In 4.12 the second UV detected ...

Given specific, non consistent, network connections, replication of some data can result in incorrect values

I appears to be possible to replicate a value and when the value gets to the client(s), it doesn't match what was sent from the server. In the project, ReplicatedActor is created by the Authority. ...

Morph Targets Get Overridden By APEX Cloth

Using a material element with Apex cloth will override the morph targets so that they have no effect. This issue didn't exist in 4.10 and seems to have been introduced in 4.11 due to the many optim ...

Landscape Mode automatically turns on Game View in Viewport

Landscape Mode automatically turns on game view in the level Viewport. Regression (yes) issue (does not) occur 4.13.2 ...

FBX Reimport Error

Reproduced in Main Promotable-CL-2471062 When reimporting an FBX Static Mesh housed in a root directory, the engine says that it successfully reimports the FBX, but quietly in the Output log fails ...

Particle System Warmup Time causing Crash with Light Module and High Quality Lights

A crash occurs when Opening a level with a Particle System that contains a warmup time and a Light module with High Quality Lights checked. This crash seems very isolated and specific as it does no ...