Dynamic navmesh update causes navlinks to reset to their default state

UE - AI - Dec 16, 2019

Updates to dynamic navmesh cause navlinks to reset to their default state. Navigation still shows the path as accessible even though it isn't. This is a regression from 4.23.1 (CL-9631420) where th ...

Post Process Material + Stereo Rendering = Left Eye Black

UE - Platform - XR - Dec 16, 2019

Left Eye Renders black in VR when a PostProcess Material is applied. On Quest Right eye renders post process mat and left eye renders scene, but upsidedown. Also occurs in Packaged Project and/or ...

FP_FirstPerson and FP_FirstPersonBP missing when adding feature packs

Docs - Samples - Dec 16, 2019

When adding the first person template (bp or code) as a feature pack, an error occurs stating "Unable to read file" and a warning "failed to import".  ...

Apex Destructibles are not properly rendered

UE - Simulation - Physics - Dec 16, 2019

For Apex Destructible components, the un-fractured mesh rendered for each asset is the same and disappears when the component fractures, despite the physics bodies being correct. ...

Editor Utility Widgets are reset every time another blueprint is reinstanced

Tools - Dec 16, 2019

Editor utility widgets were being rebuilt on GEditor->OnBlueprintReinstanced. However, this delegate is fired when any blueprint is reinstanced, which resulted in the widget being refreshed when it ...

VR Trackpad Axis Values 0

UE - Platform - XR - Dec 16, 2019

Trackpad Values return 0 Additionally: I also observed that the Go's trigger is registering as Trigger MotionController (R) Facebutton 1  and that previously there were MotionController (R) Thumb ...

"Restore Open Assets Tabs on Restart" Doesn't Reopen Asset Tabs

Tools - Dec 16, 2019

Enabling "Restore Open Assets Tabs on Restart" doesn't reopen asset tabs when opening a project . Found in 4.24 CL#10570792 Reproduced in 4.25 CL#10719465 ...

C4D Mograph not working in 4.24.0

UE - Editor - Content Pipeline - Datasmith - Importer - Dec 16, 2019

A customer is reporting that C4D mograph support is broken in version 4.24. C4D file added under [Link Removed] folder in: [Link Removed] ...

UAIPerceptionSystem::Tick() has a chance of not being called after level reloading

UE - AI - Dec 16, 2019

UAIPerceptionSystem::Tick() is not called after level reloading. When Debugging, UAIPerceptionSystem::CurrentTime is always 0, and UAIPerceptionSystem::SourcesToRegister always contains sources to ...

[CrashReporter] UE4Editor-AlembicHairTranslatorModule!ParseObject [AlembicHairTranslator.cpp:446]

UE - Editor - Content Pipeline - Import and Export - Dec 13, 2019

Generated from CrashReporter Error message: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x60b40008 Comments from Users: I cant import abc hair from Blender 2.81a. crashe ...