Ensure condition failed / Crash on BP Compile after adding variable

UE - Gameplay - Blueprint Compiler - Jan 26, 2018

Crash when compiling BP (containing user defined struct + object reference) after adding variable. ...

Child Actor Component reappears after Undoing Parent Deletion

UE - Gameplay - Blueprint - Feb 5, 2018

After loading a map containing a ParentBP with a ChildActorBP, Deleting and undoing the deletion will "resurrect" the original child, and a new child actor is parented to parent. Possibly Related: ...

Web Browser: No Transparency in 3D Widget Component on Mobile

UE - Platform - Mobile - Jul 6, 2018

Transparency is not being applied to web browser inside of 3d widget on android. Tested with Samsung Galaxy S5 4.19.2 CL 4033788 4.20p5 4173640 4.21 CL 4179794 ...

Particle systems have frame rate dependent simulations when Min Time Between Ticks is set, and ticking is managed

UE - Niagara - Jun 11, 2019

Managed ticking when combined with Min Time Between Ticks will cause particle velocity to vary depending on frame rate. ...

All console variables overridden in Movie Render Queue are set to 0 after the render queue runs

UE - Anim - Sequencer - Aug 4, 2020

All console variables overridden in Movie Render Queue are set to 0 after the render queue runs. It's because all cached previous console variables are reset to 0 just before they are written back ...

Unable to open Unreal Engine after cleaning project in XCode

UE - Platform - Apple - Aug 31, 2020

When I have the Epic Games Launcher open as I clean the Xcode project, the top right button will still read "Launch." Clicking on it after the Xcode project is finished cleaning causes the following ...

[MetaSound][Editor] - The base submix toggle is ignored when previewing sounds on the MetaSound graph

UE - Audio - MetaSounds - Apr 1, 2022

The Enable Base Submix toggle is ignored in the MetaSounds graph.  If the sound is added to a level, it behaves as expected.  The Enable Submix Sends toggle works as expected. ...

Importing Vehicle content corrupts SportsCar_AnimBP

UE - Content - Template - Apr 28, 2022

If the player imports the Vehicles pack into a blank project some of the cars blueprints will be corrupt and cannot be loaded. This appears to only happen to the Animation blueprints. ...

[Waveform Editor] - If a Sound Wave is trimmed or a transformation is added or removed while paused, play needs to be pressed twice to start the sound again

UE - Audio - WaveformEditor Plugin - Oct 6, 2022

From [Link Removed] "There is still a bug happening with editing transformations on pause. If you play, then pause, and then edit a transformation, you have to press play twice to resume play (whic ...

[Attenuation][Air Absorption] - When the listener moves across the min-distance transition point, the HPF pops

UE - Audio - Spatialization - Apr 21, 2022

A pop can be heard when crossing the Air Absorption distance range while using an HPF. From Slack: "I tracked it down to specifically the HPF – it's when the filter turns on, it jumps instantly to ...