Unreal Engine Issues

Crash when launching 4.14.2 in cmd window with -dx12 argument

Launching the editor with DX12 from a command window is crashing the engine. Note Crash occurs on Nvidia version 376.19 and does not occur on 376.33 This is a Regression ...

Destructible mesh loses collision and physics after packaging in 4.18.2

Destructible Meshes are losing collision and physics after a project has been packaged. They will work normally when running PIE. ...

Fix forwarding of dedicated flag and number of players when running a functional test

As described in the UDN question, some settings aren't forwarded correctly to the game instance in PIE during a functional test. Proposed patch attached. ...

Fix possible crash if Android audio manager does not support certain properties

Not checking for a property not being supported by audio manager, need to protect it against NULL ...

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

TSR fix excessive flickering when subpixel details are in history but not input image

Large RAM usage increase when loading some legacy scenes in 2025.2

Steps to reproduce:Open TM 2025.1Open the Salt Flats Note down the RAM usageSave the sceneOpen the same scene with the beta 3Note down the RAM usage. Compare results Expected results: The RAM Usag ...

Landscape HLODs are broken in 5.7.2 (Github Release branch)

Landscape HLODs are broke when build from Editor. See repro steps above. I have not provided a repro project as it uses the open world starter map. Note that current Main has additional bugs that o ...

[CrashReport] Mac/Metal Intel compiler crash - UE4Editor-MetalRHI.dylib!CreateMTLRenderPipeline()

Mark S: This is an Intel compiler failure on macOS 10.12.6. Callstack from LogAssertion failed: [File:/Users/build/Build/++UE4+Release-4.18+Compile/Sync/Engine/Source/Runtime/Apple/MetalRHI/Privat ...

Values are not copied for a EnumArray that is part of an exposed Struct Variable

Values are not copied for a EnumArray that is part of an exposed Struct Variable; when copying from the Details panel to a copy of the same actor. User Description: If you make an array of custom ...