Unreal Engine Issues

CompileAllBlueprints crashing on blueprint function with a delegate input.

In some scenarios, FPropertyDelegate::SignatureFunction can point to freed memory after a garbage collection run. This appears to be more common when running the CompileAllBlueprints commandlet. ...

Selection of foliage instances broken with nanite

The selection of individual instances of a foliage HISM is broken, so that the instance is correctly outlined but the gizmo is placed over a different instance. If we delete the selected instance it ...

Gameplay ability blueprints cannot be debugged in multiplayer

The object filter in the blueprint debugger can be used to filter breakpoints to a specific instance of an object. This is important for multiplayer because there will be multiple versions of the sa ...

Pose watches don't display correctly with compatible skeletons

"Hello, we've found a quirk with ABP's pose watch and compatible skeletons. Same setup as above. We have skeleton A as the base and skeleton B as a compatible skeleton. They both share similar hiera ...

Adding an Input Action to a Mapping Context causes the drop downs to expand and collapse randomly

Blueprint functions with nested structs referencing UDataAssets generate errors if root not passed by value.

The source of the error appears to be a stray DefaultValue="None" that's contained within the inner "Test_Nested_TestContainer" split pin (copy/paste the node to notepad to see this). If you refresh ...

Copying collapsed graph with a node with a custom Exec pin results in duplicate pin name

When duplicating a collapsed blueprint graph which has a node with a custom Exec pin, this results in blueprint compilation error that a duplicate named pin is found. Duplicated exec pins aren't ass ...

[AI] Navmesh does not generate correctly on a negatively scaled ISM.

Setting a single axis of an ISM negative results in navmesh not being generated on top of it. However, setting 2 axes to negative scale does have the navmesh generate as is expected.  Also see more ...

Stride Warping in manual mode not activating correctly based on first StrideScale

From licensee: If StrideScale is 1 the first time through, it initialises the StrideScaleModifierState to 1 and doesn't require updating so leaves the CachedDeltaTime at 0 by never calling Update_I ...

Duplicating an actor with a blueprint bound delegate behaves unexpectedly

When the trigger is duplicated, the contents of its OnActorBeginOverlap MC delegate are copied, which contains a reference to the BP actor that added the binding to the original trigger. Marking th ...