Unreal Engine Issues

AttachChildren can be incorrect on client if parent and attached actors are spawned at the same time on the server

See linked UDN for more info. It seems as though if both a parent actor and its attached actors are created at the same time on the server, then there is a chance the attached actors won't appear at ...

Using the Transform Tool to manipulate multiple Event Trigger keys at different times in the Sequencer Curve graph sometimes causes crash

This is not a regression. I was able to reproduce the crash in 4.26. Using the transform tool to manipulate keys for an Event Trigger within the curve editor of sequencer sometimes causes it to cra ...

Water line misaligned if Screen Percentage is less than 100% while Temporal Upsampling is enabled

Water line is misaligned if screen percentage is less than 100% while Temporal Upsampling is enabled. ...

Double clicking the thumbnail for a TSoftObjectPtr to a UWorld will load the level without prompting the user to save

Currently, double clicking on a thumbnail for a SoftObjectPtr to a UWorld will load that level in the level editor without checking if the current world is dirty or prompting to save. This can resul ...

Niagara Mesh Particles do not work with Refractions from Ray Traced Translucency

Ray traced reflections skewed with un-combined meshes

MipLevel sample mode doesn't work as expected in Adaptive RVT

Audio section has incorrect duration when pitch is changed.

Sequencer determines audio duration based on the sound, which does not factor in pitch information, so the duration will be incorrect, leading to incorrect playback. ...

UAnimInstance::GetInstanceTransitionTimeElapsed does NOT consider TransitionIndex

GetInstanceTransitionTimeElapsed doesn't use TransitionIndex. float UAnimInstance::GetInstanceTransitionTimeElapsed(int32 MachineIndex, int32 TransitionIndex) { // Just an alias for readabili ...

The drawing order of widgets becomes wrong when GlobalInvalidation is enabled,

When trying to create a widget with specific steps, the drawing order may not be correct. This is not reproduced when Global Invalidation is disabled, and the state can be restored. This issue is pr ...