Unreal Engine Issues

Intermittent Crash using Rewind Debugger in Game Animation Sample

Licensee is reporting an intermittent crash when using the rewind debugger in the Game Anim Sample. ...

Editor crashes when calling a "scroll into view" node with missing parameters

There is an issue where Editor crashes when calling a "scroll into view" node with missing parameters. This issue should be caught when compiling the blueprint as one of the values should not be nul ...

Crash when duplicating an asset before renaming it in the Content Browser

If you duplicate an asset in the Content Browser before the renaming box prompts input it will cause the Editor to crash. This was reported and tested in 4.20.3 (CL-4369336). This is reproducible ...

Adding a widget to a grid panel inside the grid panel tick can cause an out-of-bounds error

This is caused by adding an item to a grid panel inside the grid panel iteration loop. The same operation to canvas panel goes well without any errors. The difference is that the array iteration in ...

Extending Montage Segment length causes length to reset to default in new Editor Session

Licensee is encountering an issue where they would like a segment of a montage to end and hold the last frame for the remainder of the segment length. He is doing this by adjusting the End Time und ...

Editor crash when searching in Add Object menu after creating a Niagara System asset in the Motion Design editor mode

"Play Rate" below 1 and "Force Fixed Frame Interval Playback" causes choppy renders

"Play Rate" below 1 and "Force Fixed Frame Interval Playback" causes choppy renders. This was explained by Max on Answerhub to the user, but this seemed like something that should be bugged and loo ...

Crash when using AActor::Rename to change the Outer of an actor to a SubLevel

Using AActor::Rename to change the Outer of an actor to a SubLevel will cause the editor to crash when the AActor is shown in the World Outliner. Regression?: Yes This does not happen in 4.18 but ...

When using "Set Playback Position" after "Pause", actor transforms are broken

When using "Set Playback Position" after "Pause", actor transforms are broken. Sending them off to an unexpected position. Adding a delay seems to resolve the issue, but seems like it should still ...

WasRecentlyRendered() and GetLastRenderTimeOnScreen() still triggers when a skeletal mesh re-enters the view frustum despite being occluded.

AActor::WasRecentlyRendered() and UPrimitiveComponent::GetLastRenderTimeOnScreen() both still trigger when a skeletal mesh (occluded behind a wall) re-enters the player's view frustum after being ou ...