Unreal Engine Issues

Editor-only blueprints like WidgetBlueprint are not added to cooked asset registry class hierarchy

Both the Asset Registry and Asset Manager look for all subclasses of UBlueprintCore and use that to search for blueprint classes and construct an inheritance hierarchy. This always works in editor b ...

Undoing Level visibility change causes levels moves to wrong world origin offset

changing level visibility causes levels moves to strange position when using world origin shift

Selecting another level while the level is hidden cause the level moves to incorrect position. it occurs only when using world origin shift in world setting. ...

FPlatformMisc::RequestExit freezes app in IOS

See the UDN question (duplicated below). I think we need to better manage the lifetime of the event we use for synchronization here. We are experiencing an issue where when FPlatformMisc::Request ...

[Merge Actor] Lightmap UVs are broken after merging meshes

This issue occurs when merging static meshes that have multiple LODs. If they are using UV1 for lightmap index, after merging, the UV1 of the result for each LODs will all be differents, making the ...

iOS packaging does not seem to be able to exclude assets not in chunk0 when using ChunkDownloader

GetMouseX returns stuttering value if ShowMouseCursor is enabled

Showing the mouse cursor and holding down the left mouse button while dragging will cause the MouseX event to broadcast incorrect axis values.  ...

PakFiles: Unmounting PakFile while requests are still in progress causes assertion failure in UnMount

[Link Removed] Licensee is using the chunk downloader. On Shutdown method of their GameInstance, they call FChunkDownloader->Finalize. When they quit the game (Alt+F4) during a chunck download an a ...

Asset localization does not work properly for Paper2D related assets such as Flipbook

This issue is resolved by changing Paper2D's LoadingPhase to PostConfigInit, but this is a workaround. We suggest a better long term fix via AssetRegistry changes (see comments). In the default la ...

FEditorFileUtils::SaveCurrentLevel returns true even when it fails

In FEditorFileUtils::SaveCurrentLevel, we set the default return code as true (success) before checking validity of the current level or seeing if PromptToCheckoutLevels is successful. If we're unab ...