Unreal Engine Issues
Unreal Engine Issues
Crash when Toggling Landscape Mode with Hidden Sub-Level containing a Landscape
UE - LD & Modeling - Terrain - Landscape - Oct 28, 2016A crash occurs when you have a hidden Sub-level containing a landscape and you attempt to toggle the Landscape Mode after re-opening the project. The licensee has authored their own fix for this is ...
[CrashReport] UE4Editor-MetalRHI.dylib!FMetalDeviceContext::CreateDeviceContext()
UE - Graphics Features - Feb 10, 2017Error message: SEGV_MAPERR at 0x3 Source Context: Most recent user affected CL: 3249277 Logs: [Link Removed] [Link Removed] [Link Removed] [Link Removed] CrashReporter User Descriptions:Just i ...
HLOD generated proxy doesn't create or assign target lightmap coordinate index any longer
UE - World Creation - Worldbuilding Tools - HLOD - Sep 6, 2016There are instances where HLODs will either generate a lightmap but not assign it to the correct Lightmap Coordinate index from the target lightmap setting in the HLOD outliner or the Lightmap will ...
Move 'Scale is not valid' warning to MessageLog to make it more noticeable.
UE - Foundation - Core - Aug 30, 2016Memory leak when comparing scale value with 0 on transform. It appears that the memory used by the editor increases by 25-50 mbs while comparing the scale to 0. Regression (no) issue (does) occur ...
Crash when opening a level with skeletal mesh asset from the map copied to the clipboard
UE - Foundation - Core - Jul 28, 2016Navigating to a level with a skeletal mesh asset from that level copied to the clipbard from the world outliner will cause the editor to crash. This can currently only be reproduced in the TM-Contac ...
Adding a New Blackboard Key While Searching for a Blackboard Key Causes the Editor to Crash
UE - AI - Nov 12, 2015When you use the search bar located under the New Key button in a Blackboard asset, if you attempt to press New Key while you have text in the search field, the editor will crash after you select th ...
[CrashReport] UE4Editor_Slate!FMenuStack::DismissInternal() [menustack.cpp:582]
UE - Editor - UI Systems - Slate - Apr 15, 2016Error Message: Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 785] Array index out of bounds: 1 from an array of size 0 Source Context: 567 } 568 } 569 ...
Foot Placement tries to step on vertical surfaces
UE - MVF Character - Animation - Oct 31, 2023From a community member: Are you responsible also for the FootPlacement node? Its fantastic, but there is a possible bug with the walkable surface handling. It tries to step even on vertical surfac ...
Setting a struct bool property (bitfield) to itself writes the wrong value
UE - Framework - Blueprint Compiler - Sep 17, 2025There's an issue when assigning a bitfield bool to a native bool in Blueprints. Currently, the engine erroneously treats the memory for a local bool as a uint8 bitfield, which is undefined behavior. ...
Crash after creating a suboject for RootComponent if the actor is placed on the level
UE - Foundation - Cpp Tools - Hot Reload - Nov 6, 2020The crash occurs when trying to assign a new value to RootComponent if the Pawn is already placed on the level Crash does not happen in P4 //UE4/Release-4.25.3 CL 13942748 Other steps to reproduc ...