Unreal Engine Issues

D3D Device Lost 'HUNG' crash in FD3D11Viewport::PresentChecked

This is a new D3D crash affecting multiple users in 4.14 Preview 1. It is currently the #1 crash in the Preview. Information provided by users:Just pressed create project...Openning QA Game with - ...

Crash Occurs when using the FreezeRendering Console Command in a Packaged Win64 Project

A crash occurs when entering the console command, 'Freezerendering' in a packaged Windows 64 bit project. The freezerendering command is used for debugging and performance purposes. An interesting ...

Foliage meshes do not appear in high res screenshots after certain amount

When using the Engine's High Res Screenshot tool, there is a limit on the amount of foliage that can be present before the meshes stop appearing. This number is around 1500 meshes, though I was not ...

Materials using Texture 2D Arrays fail to compile

REGRESSION: Does not occur in 4.24 Materials using Texture 2D Arrays have the following errors:[SM5] /Engine/Generated/Material.ush(2225,107-114): error X3004: undeclared identifier 'Material' [S ...

Unsuccessful WP conversion when map has scripted sublevels

Linux crash upon opening maps in Soul: City content pack

Opening the maps from the Soul: City asset pack on Linux causes a crash. This seems to be rendering related. It was originally reported as a Vulkan specific issue but we've reproduced it without Vul ...

[Quartz][Device Swap] - Quartz Clock Stops when swapping Audio Output Device

When swapping the audio output device while running PIE or a packaged game on Windows, Quartz clocks stop. Does not repro in Release-4.27, but can be reproed in Release-5.0. ...

Splitting a pin on a struct with an array in it will cause an error (forcing the pin to have something plugged in)

When splitting the pin on a struct variable that has an array in it causes an error that requires the user to plug something into the array pin instead of using the default values given in the struc ...

Quickly using alt-tab with a blueprint in a new window causes the event graph to capture input of the alt key

Quickly using alt-tab with a blueprint in a new window causes the event graph to capture input of the alt key. This issue does not occur when the blueprint is a tab of the main UE4 editor window. Th ...

Stride Warping in manual mode not activating correctly based on first StrideScale

From licensee: If StrideScale is 1 the first time through, it initialises the StrideScaleModifierState to 1 and doesn't require updating so leaves the CachedDeltaTime at 0 by never calling Update_I ...