Unreal Engine Issues

Editor crash when saving a level instance in a folder with the same name as the level

[CrashReport] UE4Editor_LevelEditor!FLevelEditorActionCallbacks::Paste_CanExecute() [leveleditoractions.cpp:1662]

This is a common crash affecting users in 4.16, and has occurred since at least 4.14. User DescriptionsI was copying and pasting a Geometry Box and then the client just crashed.I was trying some st ...

Update Mesh Section incorrectly sets vertex colors for a Procedural Mesh

This is a regression tested in //UE4/Release-4.27 CL#18319896 Update Mesh Section incorrectly sets vertex colors for a Procedural Mesh. The closer a colors R, G, or B value is to 1.0 or 0.0 the mor ...

[CrashReport] PhysX3PROFILE_x64!physx::Sc::BodySim::activateInteractions() [scbodysim.cpp:496]

This is a common crash affecting users in 4.16. The callstack is very similar to [Link Removed], which has previously been fixed. User DescriptionsTesting destruction of generated destructables. T ...

Slow Actor ContainsDataLayer / HasDataLayers

AActor ContainsDataLayer Is Slow: Navigation builds are heavily slowed down by TObjectPtr to TSoftObjectPtr conversions when checking if DataLayerAssets contain Users discovered a huge time los ...

[CrashReport] UE4Editor_Engine!FPhysScene::SyncComponentsToBodies_AssumesLocked() [physscene.cpp:1271]

This is a common crash in 4.18 and 4.18.1. The callstack shares similarities to [Link Removed], although that has been confirmed fixed in 4.18. Included in the same crashGroup are also a few Ensur ...

EDITOR: High Resolution Screenshot: Unable to capture high res shots in game or during cinematics

BRANCH: //depot/UE4/Promotable-CL-2281016 CHANGELIST: 2281016 BUILD TYPE: P4 PLATFORM: Windows FREQUENCY: 3/3 DESCRIPTION: Unable to capture High Res shots in game or during cinematics REPRO STEPS: ...

World Partition - Deleted actors can become unloaded prior to saving

In world partition levels, deleted actors can become unexpectedly unloaded prior to saving, causing loss of work. Specifically, this issue occurs after the undo history has been cleared (either manu ...

[AI] Navmesh does not generate correctly on a plane that has a slope of 45 degrees or more.

Navmesh generation appears to have issues handling terrain and planes that are at 45 degree or steeper angles even if the agent max slope is set to allow for such movement. While the issue occurs at ...

[CrashReport] <unknown module>!UE4Editor_Core!FDebug::AssertFailed()

Error message: Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 678] Array index out of bounds: 0 from an array of size 0 Source Context: 80 } 81 else ...