Crash when reimporting staticmesh fail

Tools - Import - Feb 12, 2020

When a re import fail, we currently delete the package which in a reimport case produce a crash later. If a reimport fail we should abort and make sure the asset is not touch and exactly like it wa ...

BUG IN CLIENT OF LIBDISPATCH: crash on KeyPress down in WebBrowser

Tools - Feb 12, 2020

FCEFWebBrowserWindow::OnKeyDown() InternalCefBrowser->GetHost()->SendKeyEvent(KeyEvent); is processed on the UE4 GameThread, inside the Chromium Embedded Framework (CEF) it appears to call a syst ...

Show collision can't display Complex Collision Mesh

Physics - Feb 12, 2020

"viewmode collisionpawn" and "viewmode collisionvis" can not display complex collision meshes as well. ...

Restore state on animation in level sequence will stop all montages

Tools - Sequencer - Feb 12, 2020

It looks like UnbindFromSkeletalMeshComponent stops all montages. This is called when the animation section restores its state.  ...

Unable to input with IME in widget component.

Tools - UMG - Feb 12, 2020

Unable to input IME text in widget component, but able to input IME text in textbox like UMG designer.  It works fine until 4.21, however it wasn't able to work after 4.22. Workaround: void FSla ...

Crash when using both tessellation and virtual texture on a landscape material

Tools - Landscape - Feb 11, 2020

When a landscape is set up to use runtime virtual texturing. If it uses a material that writes to a runtime virtual texture and has tessellation enabled. Then we see a crash and the log reports: ...

Atan2() missing from Math Expression node

Gameplay - Blueprint - Feb 11, 2020

Using the math expression Atan2(y,x) inside of a math expression node results in an error.  Tested in:  4.23.1 CL#9631420 ,  4.25 CL#11341939 ...

Niagara viewport does not adjust exposure when set to auto

Rendering - Niagara - Feb 11, 2020

The Niagara viewport does not adjust exposure when using the Auto setting for exposure. This is especially pronounced when using physically based values for skylight intensity.  ...

Skybox not rendering in packaged project with Vertex Fogging enabled

XR - Feb 10, 2020

Vertex Fogging setting causes skybox material on large skybox mesh to not be rendered. Confirmation for 4.25 blocked by UE-86577 ...

Placing 'Groom' asset into scene results in assertion failed

Rendering - Features Teams - Feb 10, 2020

Dragging a groom asset into the level results in a crash. Link to Project: [Link Removed] Tested in:  4.25 CL#11223911 ...