Unreal Engine Issues
Unreal Engine Issues
BlackmagicMediaSource causes a memory leak if "Just-In-Time Rendering" option is ON.
UE - Virtual Production - IO - Media - Oct 31, 2023Since 5.3, BlackmagicMediaSource causes a memory leak. This didn't happen on 5.2. You can see the leak on PIE. [Image Removed] [Image Removed] If "Just-In-Time Rendering" option in the MediaB ...
Control Rig Creation Crash Triggered by “skel” Prefix in Skeletal Mesh Name
UE - Anim - Rigging - Control Rig - Nov 27, 2025When generating a Control Rig from a Skeletal Mesh that contains “skel” in its name—or uses it as a prefix (i.e. skel_test)—Unreal Engine crashes. The crash occurs both when using the native Creat ...
Blueprint Editor: BP functions display dropdown instead of checkboxes for uint8 enum parameters
UE - Gameplay - Blueprint Editor - Aug 8, 2017I traced through the callstack and it looks like the problem is as follows:in order for the BP function to compile, its enum parameter must be uint8, because that is the only type supported by BP fu ...
Imported tiled landscapes into World Composition Browser have seams between landscape tiles
UE - LD & Modeling - Terrain - Landscape - Mar 19, 2015Landscape seams appear between world composition browser imported heightmap tiles. Workaround: Run over seam with smoothing tool set to strength 0.0 ...
World Composition Browser sublevels register as edited/needs to be saved when levels browser is closed and reopened
UE - LD & Modeling - Terrain - Landscape - Mar 13, 2015Sublevels appear dirty when the level browser is closed and re-opened. ...
Cast nodes compile without warning when no object is selected/passed in
UE - Gameplay - Blueprint - Jan 8, 2015Cast nodes compile without warning when no object is assigned to the cast nodes object input pin. ...
Altering Player Controller in Gamemode resets upon reloading project
UE - Gameplay - Blueprint - Nov 26, 2014If a user sets the player controller to a custom Player Controller inside of a gamemode, then compiles, saves, and closes both the blueprint and the editor. Upon reloading the player controller in t ...
Using the Windows 10 Chinese Pinyin keyboard can cause the editor to crash
UE - Editor - UI Systems - Localization - Nov 1, 2016When the Windows 10 Chinese Pinyin keyboard is being used to enter text into a context menu in a graph editor and is interrupted by the context menu being closed, the editor freezes and results in a ...
Skeletal mesh always registers as Dynamic when testing collision
UE - Gameplay - Oct 26, 2016Skeletal meshes do not respect collision changes from World Dynamic, always returns as Dynamic. Regression (no) issue (does) occur in 4.12.5 ...
Engine crashes when adding 'Tick' to HideCategories in a BP or C++ project
UE - Gameplay - Blueprint - Mar 6, 2015When adding the word 'Tick' to HideCategories in a blueprint or C++ project, the Editor crashes, with a crash reporter. ...