Unreal Engine Issues

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 ...

Crash in GC - FSharedStruct reachability race condition

This Jira was created from the linked EPS case: =============================================== This issue is caused by FSharedStruct batching reachability requests to the same underlying FInstan ...

Bloom not Working on Samsung Galaxy S5

As the title suggests, bloom on the Samsung Galaxy S5 is not working. I tested this against another android device, the Acer Iconia Tab 8, which also supports Full HDR w/Sun according to the docum ...

Put fix for UE-39713 into 4.14.3 (Memory leak in GPURealloc)

LLDB 2-byte char data formatter script fails in Android Studio

Android Studio does not properly parse the UE4DataFormatters_2ByteChars.py distributed in 4.20. ...

Groom/hair "exploding" in multiplayer mode (PIE Listen Server + 2 Players)

Starting 2 editors with remote control plugin enabled will impact performance

Launching a second editor with the websocket server enabled will try to bind to the same address as the first editor, and since the websocket server is running in the game thread, it will block the ...