Unreal Engine Issues

Collision Channel on Particle Systems not saving

Setting the Collision Channel to anything other than World Static will reset on closing and restarting the editor. ...

Components attached via AttachToComponent do not animate correctly when recorded by sequencer

When an actor is attached by the root to a bone of a skeletal mesh through the use of the "AttachToComponent" function in code, it will not follow animations when being recorded by the Sequencer Rec ...

Unable to save blueprint after Hot Reload that affects the class the blueprint is based on

After hot reloading a project, if the class a blueprint is based off of was edited, the blueprint is unable to be saved due to being referenced in Engine/Transient. Project for Repro: [Link Removed ...

Crash upon attempting to compile a blueprint while Git source control is active

If a user connects to source control through the Git plugin and creates a repository, when they try to compile a blueprint, they can sometimes crash ...

[CrashReport] Crash trying to destroy an uber graph frame because the RawPointer is still set

This is a trending crash in the 4.17 Preview. Users have not provided any descriptions of their actions when the crash occurred. Source Context 2408 uint8 *Data = (uint8*)Dest; 2409 ...

Unable to Create New Niagara User Parameter After Deletion without Niagara Editor Window Restart

When a user deletes a Niagara User Parameter within the Niagara System editor window, attempting to create a new parameter with the same name immediately after deletion results in an error. Despite ...

FMediaFoundationMovieStreamer::Init() returns true even if the movie could not open.

Custom Enums break blueprints on hot reload

If a custom code based enum is used inside a blueprint, doing a hot reload will break the nodes by assuming they are of a type other than enum. ...

Event Dispatchers do not update references when renamed

Event Dispatchers do not update event references when renamed if the green "+" is used to add the event in the Details Pane of an actor component. Note: Event Dispatchers appear to rename normally ...

Removing Pose from Blend by Enum causes compile error with float defining blend time

Removing Pose from a Blend by Enum node can cause compile errors when a float is defining all of the blend times. ...