Unreal Engine Issues

Crash after enabling iOS Metal Desktop Renderering and then enabling iOS SM5 Preview Rendering Level

[Alias] Reimport of a StaticMesh failed

The user suggest to add the option "Only New Meshes" ...

Incremental Cooks: Add dependencies on files loaded during Load/Save of the package

Iterative and Incremental cooking are supposed to recook packages when their "inputs" change. Most of the time inputs are the package file itself and the other package files on which it has dependen ...

Network Emulation outgoing dropped packets on client higher than expected

Under certain network emulation settings, it looks like outgoing packets from the client will be dropped in groups (around 4 or more packets at a time) rather than individually. This leads to the ac ...

Command buffer failure rates increased on iOS 15 devices compared to earlier iOS versions

There is a licensee report that command buffer failure rates on iOS 15 devices have increased compared to earlier iOS versions, and the issue may be related to foregrounding or backgrounding. ...

Blend Space Graph node doesn't display fast path icon

Because SGraphNodeBlendSpaceGraph inherits from SGraphNodeK2Composite rather than UAnimGraphNode_Base as with most anim nodes, we aren't able to make the check as to whether the node is fast-path co ...

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 ...

[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 ...

Crash when loading Anim BP after undoing and saving "Use Shared Rule" in state machine

Reported by UDN  [Link Removed] From Slack discussion: It seems that undo-ing the transaction in UAnimStateTransitionNode::UseSharedRules, leaves the outer graph (UAnimationStateMachineGraph) wit ...

Physics Constraint returns incorrect values for Swing1, Swing2, and Twist

Tested in //UE5/Main CL#20966071 Tested in //UE4/Release-4.27 CL#18319896 Physics Constraint returns incorrect values for Swing1, Swing2, and Twist. ...