Unreal Engine Issues

[AI] Fill Collision Underneath for Navmesh does not work for ISM instances

Although the ISM component allows for enabling the flag for Fill Collision Underneath for Navmesh, it does not add the modifier for this to the navigation data for its instances.  ...

Selecting and dragging multiple tracks on Sequence window combines the tracks to one row

With plural shot tracks in different rows in the sequencer window, selecting these tracks and dragging one of them (but not the bottom one) left or right will merge the rows. Please check the attach ...

[AI] Stack overflow in canRemoveVertex of DetourTileCacheBuilder

User reports of stack overflow happening in canRemoveVertex in DetourTileCacheBuilder.cpp if a poly has more than 16 vertices. The array for edges is a fixed array and is written to without checking ...

[AI] SmartObject with Precondition in a persistent collection crashes editor when exiting PIE

Adding the Precondition to the SmartObject caused an assertion when it was part of a persistent collection. The precondition needs to be able to pass its Activate method to cause the assert. This b ...

Multi-process cooking does not complete in UE5.3.0

Projects with multi-process cooking enabled will not complete packaging. If MPCook is disabled, packaging can be completed.  ...

[Interchange - glTF] Incorrect results when importing a GLB with skeletal animation

Control rig functions can't be accessed from other control rigs after save on compile

It looks like there is an issue with control rig functions and the save on compile option.  When a control rig is saved via this setting, public functions within the control rig can't be referenced ...

Lyra - Grant Nearby Interaction Ability Task used as source object but doesn't replicate

UAbilityTask_GrantNearbyInteraction passes itself as the source object when making the Interaction Ability Spec in UAbilityTask_GrantNearbyInteraction::QueryInteractables. This causes the "Warning: ...

Fix MM node "Yaw From Animation Blend Rate" for skeleton with root bone rotated X or Y up

Paper2D crashes on flipbooks with dynamic materials

Having flipbooks with dynamic materials and then playing/stopping multiple times crashes the editor. ...