Unreal Engine Issues

APEX Destruction works in the Mobile Preview window

APEX destruction renders when using the Play > Mobile Preview. ...

Using Set World Origin Location will cause the player pawn to stutter

Using Set World Origin Location will cause the player pawn to stutter. The faster the player is moving, the more prevalent the stuttering becomes. User Description: I have encountered a problem wh ...

[CrashReport] USpeedTreeImportFactory::FactoryCreateBinary()

This is a common and longstanding SpeedTree import crash that has occurred since at least 4.14 for over 100 users. This seems to be the same issue as a previous Jira from 4.10 which was closed wit ...

Closing editor after quitting a standalone game causes a crash.

The editor will produce a crash most of the time when closing editor after quitting a standalone game. This is a regression due to it not occurring in 4.26. ...

LayeredBlendPerBone with BlendRootMotionBasedOnRootBone set incorrectly calculates root motion weightings with more than two sources

When BlendRootMotionBasedOnRootBone is true, the code in  FAnimNode_LayeredBoneBlend::Update_AnyThread that calculates the root motion weightings for the sources doesn't appear to account for the po ...

When transferring data from CPU to GPU particles using Array, if CollisionQuery is used simultaneously, the Array cannot be read correctly.

Struct that is referencing a Custom bp Class will reset to default values on editor restart

Struct that is referencing a Custom bp Class will reset to default values on editor restart User Description: Making a array of object types in a struct. the goal is to have a struct containing wa ...

Startup Movies Black Screen in Packaged Projects

Startup movies displaying black screen in packaged projects. Tested with 4.20p3 4135216 and 4.21 4157973 ...

Tick delta time does not provide the time between ticks (as stated in documentation)

In the description for delta time given for the tick event it states "Game time elapsed since last call to Tick". This sounds as though it is supposed to calculate the time in between ticks. However ...

Post Process Ambient Cubemap Tilted

User imported a custom image in the correct format to be used as an Ambient Cubemap within the Post Process Volume. Enabled detailed lighting mode by pressing Al+5 and the image has been tilted/of ...