Unreal Engine Issues
Unreal Engine Issues
iOS movie (mp4) has no sound in the playback.
UE - Platform - Mobile - May 16, 2017There is no sound in the movie play in iOS, built with 4.16 GitHub source code version. you can simply reproduce using attached sample project. This is reproduced in iPhone 5s(10.3.1) iPhone 6(iOS ...
Scroll bar jumps to the top of the window when changing Output Log 'Categories' checkboxes
Tools - Aug 8, 2017When the Categories dropdown is changed in the Output Log, the scroll bar will jump to the top of the page. This does not match the behavior of using the search bar which will keep the scroll bar a ...
On mouse Down not firing for left click on Button widgets when using precise click
UE - Editor - UI Systems - Aug 31, 2017When using the left mouse button to click and drag a button, the on drag detected will not fire even when using precise click. This was not the case in previous versions of the engine (Works as expe ...
[CrashReport] UE4Editor_RHI!FClearValueBinding::GetClearColor() [rhi.h:989]
UE - Platform - XR - Mar 27, 2018No user comments in crash group 986 FLinearColor GetClearColor() const 987 { 988 ***** ensure(ColorBinding == EClearBinding::EColorBound); 989 return FLinearColor(V ...
Ray Tracing Translucency - Sample settings have no effect
UE - Graphics Features - Lumen - Oct 15, 2020Ray tracing translucency samples per pixel settings have no visible effect. Reported and tested in version 4.25.3(CL 13942748). Tested and found in versions 4.25.3 and 4.26.0 Preview 2(CL 14419252 ...
Animation Sequence Keyframe icons missing after adding a Keyframe
UE - Anim - Runtime - Jan 13, 2023Regression: Tested in UE5/Release-5.0 at CL 20979098, this issue occurs there as well so this is not a regression. This issue occurs with any bone and setting any amount of Keyframes on any frame. ...
Build geometry removes spline component visibility
UE - Framework - Components - Jan 23, 2023A spline component will become invisible after building geometry with the spline actor in the level. This issue is occurring in //UE5/Release-5.1 @ Binary CL 23058290 This issue is NOT occurring ...
Nvidia DLSS plugin causing crash in PIE
UE - Graphics Features - Feb 10, 2023The editor is crashing with the 5.1 Nvidia DLSS plugin enabled after performing PIE. This issue is occurring in Binary //UE5/Release-5.1 at CL 23901901 This issue is NOT occurring in Binary //UE5/ ...
Improper clipping in children of a retainer widget
UE - Editor - UI Systems - Slate - Jan 21, 2025Children of retainer widgets have improper clipping, causing any widgets set to "Clip to Bounds" to clip incorrectly. This may also affect hit testing in cases where multiple retainer widgets are ne ...
Seam visible when using a material with BumpOffset on a Nanite mesh
UE - Graphics Features - Nanite - Sep 18, 2025When a material that uses BumpOffset is fed into the Emissive Color of Surface Opaque Default Lit material and then applied to a nanite mesh, a visible seam can be seen along edges and the intersect ...