Unreal Engine Issues

[AI] UE_MT_SCOPED_READ_ACCESS(NavElementAccessDetector) Fails in editor on fresh sync

Licensees have reported failed multi-thread access code for NavElementAccessDetector in complex levels that have not finished compilation of their static meshes. The eventual failed check is inside ...

[CrashReport] UE4Editor_MeshPaint!FBaseMeshPaintGeometryAdapter::GetVertexPosition() [basemeshpaintgeometryadapter.cpp:70]

This is a trending crash coming out of 4.18, and may be a regression. Users have not provided any descriptions of their actions when the crash occurred. Source Context 57 const TArray<FVec ...

[CrashReport] UE4Editor_SlateCore!TArray<FHittestGrid::FCachedWidget,FDefaultAllocator>::Empty() [array.h:1530]

This is a trending crash coming out of the 4.18 release. Users have not provided any descriptions of their actions when the crash occurred. Nearly all affected project names reference that this occ ...

Incorrect Velocity Calculation at Animation Sequence Transitions in Level Sequence

When adding an Animation Track to a Level Sequence and placing Animation Sequences back-to-back without gaps, the velocity can be miscalculated at the transition between sequences. This issue occur ...

Level cannot save when compile setting is changed on blueprint present in level

When using a project that has a blueprint in a level when the project is created, there is an issue that is occurring when you modify the compile settings and attempt to save the level There is an e ...

WP HLOD Crash on Small Cell Sizes

Create Session does not work in a packaged game from any project that has used C++

After adding C++ to a content-only project, Create Session no longer works in a packaged game. The following warning appears in the log: LogScript:Warning: CreateSession - Invalid or uninitialized ...

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 ...

[CrashReport] GPUCrash - exiting due to D3D device being lost - D3D Hung - Nvidia

Separating [Link Removed] into Nvidia and AMD tickets.This ticket will house Nvidia information Exported data on 5/14/2019 with following Query:1 Month Time FrameMajorVersion is 4.22.1Callstack Con ...

Android crash a couple minutes into StrategyGame

This didn't occur on iOS; so far this has only been tested in StrategyGame The device this occurred on was Nexus5X_6713_Adreno 418, 6.0.1 It did not occur on: iPad Mini 4_6242, 9.2.103-08 14:12:0 ...