Unreal Engine Issues
Unreal Engine Issues
Edit Condition does not work properly when the structure is used as a key for Map
UE - Framework - Blueprint - Jun 19, 2025When the structure is used as a key for Map in Blueprint, Edit Conditions does not work properly. It will be updated when you move the focus to a different location(ex. a component) and click the v ...
F9 Causes the screen to mostly black out and become unresponsive
UE - Editor - UI Systems - Apr 28, 2015The screen may turn black if the user attempts to resize the window, the window may not update fully causing a clipping graph look (see attached image) and the user cannot stop simulating without cl ...
Crash on launch from executable after upgrade from 4.7.3 to 4.7.4 (CachedAssetRegistry.bin corruption).
Tools - Apr 3, 2015A user is reporting a crash on launch when launching from the executable rather than the Launcher. User did not have the problem in 4.7.3. No logs or additional information was provided beyond this: ...
Double clicking the thumbnail for a TSoftObjectPtr to a UWorld will load the level without prompting the user to save
UE - Editor - Dec 6, 2021Currently, double clicking on a thumbnail for a SoftObjectPtr to a UWorld will load that level in the level editor without checking if the current world is dirty or prompting to save. This can resul ...
Ocean not centered at correct location when placed away from the origin
UE - Graphics Tools - Terrain - Water - Mar 21, 2023This display problem is a problem in the editor and Ocean was drawn normally during the PIE. When the problem occurred, we observed that only a part of the WaterInfoTexture in the WaterZone was wri ...
Attempting to rotate a physics actor in blueprints through a custom component does not correctly respond to rotation input
UE - Gameplay - Mar 28, 2016SetRotation in a custom component based on another actor's linear velocity incorrectly updates the velocity of the parent blueprint containing the custom component. This causes sporadic, jittery mov ...
Adding Variable to Struct (Exposed on Spawn) breaks SpawnActor functionality without error/warning
UE - Gameplay - Blueprint - Aug 16, 2018Adding a variable to a Struct used with SpawnActor breaks functionality without warning. Workaround: Clear Class from SpawnActor and reassign same class User Cites Blueprint Compile manager as fau ...
Light shaft bloom produces heavy flickering when offscreen
UE - Graphics Features - Dec 18, 2019See attached video. Happens always in editor, will also happen in standalone game but only if viewport rect has not the full window size. The issue was not present in 4.22. Update 1/22/20: A ...
Drag and drop does not work from a window created with PySide
UE - Editor - Workflow Systems - Feb 5, 2026The cursor position is no longer updated during drag and drop, so drag-over events cannot respond correctly. Commenting out the following code in WindowsCursor.cpp works as a workaround ( the behavi ...
Ensures showing uncompressed animations in anim blueprints
OLD - Anim - Sep 21, 2016Ensures occur when selecting Show > Uncompressed Animations in an animation blueprint. This was discovered when investigating [Link Removed]. So far I've only reproduced this issue with QAPawn_Ani ...