PIE crash due to non-empty ULevel::DestroyedReplicatedStaticActors array

UE - Networking - Feb 17, 2020

It's possible to end up in a state where some entries were saved in ULevel::DestroyedReplicatedStaticActors, which causes a crash when PIE starts up. I'm not sure how entries could end up in this l ...

Adding multiple streaming levels to the world in a single frame can potentially exceed time slicing budget

UE - Gameplay - Feb 17, 2020

If a level uses most of the time slicing budget but not all, the next level in the list will begin to load and could potentially use the full time slicing budget. In the worst case scenario, you cou ...

Sound Quality is worse after import

UE - Audio - Feb 17, 2020

After importing a sound file, it's sonic characteristics are changed and the sound is not the same as the original. This leads to inconsistency. The sound is the same with Compression set 100. Two ...

Steam VR - Wrong Key returned on Action Mapping

UE - Platform - XR - Feb 17, 2020

VR InputAction returns wrong Key. Did not reproduce with Rift Confirmed in 4.26 MAIN @ CL 11451261 ...

UMG Crashes When Using "Create Dynamic Material Instance" With An Optional Name Twice

UE - Editor - UI Systems - Feb 17, 2020

When using an Optional Name parameter in Create Dynamic Material Instance while using the same Optional Name twice in UMG the engine crashes. I have tested this in a actor blueprint that applies th ...

Modified a mesh used as complex collision mesh does not affect the collision in the editor

UE - Editor - Feb 17, 2020

When a user changes any properties (for calling PostEditChangeProperty ) in parent static mesh or restarting the editor, the modified mesh is applied correctly. how to reproduce: [Link Removed] ...

Investigate/fix navmesh tiles disappearing randomly when level stream in.

UE - AI - Feb 14, 2020

See UDN description: https://udn.unrealengine.com/questions/554749/bug-navmesh-streaming-and-tile-corruption.html ...

Load Stream Level action doesn't trigger out execution pin if the level is invalid

UE - Gameplay - Feb 14, 2020

As a user I would expect the out execution pin of the LoadStreamLevel node to fire even if the level failed to load.  ...

Skybox Textures Have a Seam When Using a Cube With Inverted Normals

UE - Graphics Features - Feb 14, 2020

Skybox textures can have a seam when using an inverted cube for a sky. Attached is an example 4.24.2 project. Note: One of the attached seam screenshots is hard to see unless you expand it. Found ...

Get Niagara Emitter Vec3 Attrib Results in Hard Crash

UE - Niagara - Feb 14, 2020

Also tried it out by replicating the setup in an Actor blueprint with the same result. ...