Unreal Engine Issues

Editor crashes after redoing the addition of a component to a static mesh actor

This is not a regression. This also occurs dating back to 4.15 and 4.14. The editor crashes on this check in FLevelEditorActionCallbacks::Paste_CanExecute() when updating the Edit menu state: chec ...

Option "Use Mouse for Touch" does not work correctly when running the game in "Standalone" or "New Editor Window (PIE)" modes: Virtual joystick does not appear and mouse cursor is incorrectly hidden while captured.

The Editor provides option "Project Settings – Engine – Input – Mouse Properties – Advanced – Use Mouse for Touch" to allow testing virtual joysticks and other touch controls with the mouse. When ru ...

Crash in Retarget Manager with Humanoid Rig when trying to re-assign a bone to a node

Crash in the Retarget Manager with Humanoid Rig when trying to re-assign a bone to a node. Happens particularly when there is already a bone selected and you want to select a new one. [Link Remove ...

Delta struct serialized fast arrays replicating new elements with no changelist

There is a scenario where delta struct serialized fast arrays can replicate changes that introduce additional elements to the array, but without changelists containing the new data. This needs furt ...

[CrashReport] UE4Editor_LevelEditor!SLevelViewport::BindShowCommands() [slevelviewport.cpp:1429]

This is a longstanding but infrequent crash that has occurred since at least 4.16.1. Users have not provided any descriptions of their actions when the crash occurred. The callstack closely matche ...

Datasmith error when attempting to package - Error: Ensure condition failed: It->Value File:Engine\Plugins\Enterprise\DatasmithContent\Source\DatasmithContent\Private\DatasmithAssetUserData.cpp

Enabling Override Instance Data to a LevelSequencerActor that has a Shot Track can lead to crashing the engine

Enabling Override Instance Data to a LevelSequencerActor that has a Shot Track can lead to an Actor being translated really far, or even a crash in the engine. The licensee has encountered a particu ...

Opening Persona causes editor to crash on Linux

Attempting to open a skeletal mesh or animation in Persona causes the editor to crash. Regression: Yes Working: 4.13.2 - CL 3172292 Broken: 4.14.0 - CL 3195953 ...

Connecting GetSequenceBinding node to LevelSequence including Spawnable Actor etc. will result in error

[Link Removed] ・Open attached project ・Open NewMap ・Confirm that an error appears on the console ・When creating a Windows (64-Bit) package in this state, the same error occurs ...

Slow-rendering thumbnails can be queued up for real-time updates

A licensee is seeing performance drops while using the editor due to a custom thumbnail renderer taking a while to generate thumbnails while Real-Time Thumbnail rendering is enabled, and has request ...