Unreal Engine Issues

No warning is shown when a disabled mobile shader permutation is required for rendering

bIsComposing assert with Japanese MS-IME input(candidate list related)

When using MS-IME as Japanese input method, scrolling out the text field out side the view causes bIsComposing to be set false - this state causes instability of the editor. Crash happened with Win ...

Collision problem in nativized blueprint

Issue reported by one of our licensee on the Japanese UDN https://udn.unrealengine.com/questions/480660/view.html ...

Screen space reflection flickering

Flickering is occuring when using a reflection material with screen space reflection enabled. Did not start occuring until 4.19 and beyond.  Tested in: 4.23.1 CL#9631420, 4.24 P3 CL#10283392, 4 ...

Spline Mesh Collision doesn't work in packaged game when spawning them at runtime

Spline Mesh Components lose their collision in a packaged game when spawning them at runtime, or modifying them via 'Set Start and End' function at runtime. ...

Show Flags are changed to the state that they were set on editor startup when switching to a different level

Show Flags are changed to the state that they were set on editor startup when switching to a different level It appears that the state of Show Flags are stored in the editor on shut down, this is c ...

HLOD lightmap lost after level reopening with "save LODActors to HLOD Packages" option in project settings is on.

Editor Crash when changing Default Properties of a TArray of UStucts containing an InlineEditConditionToggle property in Blueprint Parent Class

This bug causes an editor crash. This crash occurs when changing the default values of a UStructs properties that are used as EditConditions, when they are set to InlineEditConditionToggle within a ...

Crash in FWebRemoteControlModule::HandleBatchRequest() when not enforcing passphrase on requests

When a client sends a request with no passphrase to Unreal Remote Control's "/remote/batch" endpoint, and the plugin is configured to not perform passphrase verification, the Editor will crash as so ...

Adding a StaticMeshComponent pointer to a derived StaticMeshComponent class has inconsistent behavior

Adding a UStaticMeshComponent pointer to a class derived from StaticMeshComponent allows for two meshes to be set by a single component. Setting two meshes inside a blueprint this way will only allo ...