Unreal Engine Issues
Unreal Engine Issues
Swarm Agent Binaries Missing in Launcher 5.7 Preview
zComponent - Archive - Oct 23, 2025The Swarm binaries are missing from Engine\Binaries\DotNET in the 5.7 Preview launcher version of the engine. This causes any lighting build or precomputed static visibility builds to fails due to t ...
Event Dispatcher not being called in 4.6
UE - Gameplay - Blueprint - Dec 8, 2014ED nodes in 4.6 but are not being executed in standalone or cooked games. Also, users receive compile errors when the project is saved and reopened that resolve when the blueprint is recompiled. ...
Crash on UObject::ProcessEvent after 4.7 update
UE - Editor - UI Systems - Feb 27, 2015Crash Report [Link Removed] Bugg 38910 After updating project from 4.6.1 to 4.7, user experiences unexplained crash when playing in editor. *In addtion to the crash report, the user provides a lot ...
Upgrading from 4.6 to 4.7 can cause the loss of functionality for blueprints
UE - Gameplay - Blueprint - Mar 8, 2015When the user clicks PIE the project functions as intended (the mummy rotates to follow the player). However, when the user plays in Standalone the mummy no longer rotates properly. ...
Lightmass CalculatePointShadowing regression in UE5.6
UE - Graphics Features - Oct 14, 2025There is a regression or change in the Build Lighting process when using Lightmass in Unreal Engine 5.6:When building lighting with Lightmass calling the CalculatePointShadowing function, the result ...
NavMesh does not update properly when "Can Ever Affect Navigation" is toggled
UE - AI - Mar 27, 2015if I place a mesh with "Can Ever Affect Navigation" set to true, then set it to false, it will leave the NavMesh with a bugged "hole" that AI does not path around correctly (causing the "Blocked" er ...
Default Data Wire Thickness in the Editor Preferences only affects Single Value data wires. Containers (Array, Set, Map) line thickness are wrongly tied to Default Execution Wire Thickness.
UE - Framework - Blueprint Editor - Aug 19, 2024Changing the "Editor Preferences > Content Editors > Graph Editors > Tracing > Default Data Wire Thickness" value in the "Editor Preferences" only affects single value data wires. Containers (Array, ...
Converted 4.7.2 project crashes on open after successful recompile
UE - Gameplay - Blueprint - Mar 13, 2015User's Project is crashing since converting to 4.7.2. I have attached the project itself below, but after conversations with the user and seeing pieces of the project, this issue may be related to ...
Window Size does not Change to iPhone 6 presets when in Standalone Game or Mobile Preview (PIE)
Tools - Apr 12, 2016You cannot adjust the Window size to the iPhone 6 or iPhone 6 + preset Common Window Sizes in the Editor Preferences. Regression: this did not occur in UE 4.10 NOTE: This does not occur in New Ed ...
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: ...