Unreal Engine Issues

Exporting a spawnable through Python doesn't work

Large Landscapes cause long PIE start time delays

These delays appear with large Landscapes (for example 8029 x 8029) . The delays only start occurring after the level is saved and reopened. After which PIE start times will be 5 to 15 times longer ...

Attached actor in Sequencer does not detach regardless of the detach state settings until Sequencer is restarted

Attached objects in sequencer do not detach with newly specified "When Finished" property until Sequencer is restarted.  Tested in: 4.23.1 CL#9631420  4.25 CL#11062379 ...

No alpha to coverage for ES3.1 and mobile Vulkan

MSAA is not applied to masked textures/materials. Testing blocked in MAIN 4.25 @ CL 11144351 by [Link Removed] ...

UHT not properly handling deprecated UFUNCTION parameters

Compilation will fails with an error on TSubclassOf<UDEPRECATED_SomeData> ...

Navmesh drawing is not visible during Simulate or PIE unless Supported Agents includes the first agent

In Simulate or PIE it is not possible to see any Navmesh Volumes past the 1st in a multi-navmesh setup. Any Nav Volumes after the 1st need to have the 1st one enabled for them to be drawn in the Lev ...

BP - Nativizing a UMG widget hierarchy in which a child widget of another widget BP type has the "Is Variable" box unchecked will result in a crash at runtime.

When the "Is Variable" box is unchecked for a BP-typed child widget, a variable will not be created at Blueprint compile time to reference the child widget in the nativized widget BP class. This bre ...

VSCode finds intellisense errors in Project source files: cannot open source file "UBT_COMPILED_PLATFORM/UBT_COMPILED_PLATFORMPlatformCompilerPreSetup.h"

VSCode finds intellisense errors in Project source files: cannot open source file "UBT_COMPILED_PLATFORM/UBT_COMPILED_PLATFORMPlatformCompilerPreSetup.h" Similar to [Link Removed], but that was onl ...

Entering a new Namespace into a Niagara Parameter Collection appends the previous namespace to all parameters currently in the Collection

Entering a new Namespace into a Niagara Parameter Collection appends the previous namespace to all parameters currently in the Collection Once this issue occurs, any change to the NPC's Namespace i ...

Can't fire custom event of event track when enabled auto scroll.

If Auto Scroll is enabled, event track can't  trigger, so events may not fire. The frame numbers appear to be duplicated. Especially noticeable when the [View Range End Time] is small value (Working ...