Unreal Engine Issues
Unreal Engine Issues
Crash due to D3D device being lost. (Error: 0x887A0006 - 'HUNG')
UE - Graphics Features - Feb 22, 2017This JIRA has been made to consolidate all "D3D device being lost. (Error: 0x887A0006 - 'HUNG')" crashes into one. Previous Jira tickets include:[Link Removed][Link Removed][Link Removed][Link Remo ...
Packaging for HTML5 seems to have grown in package size
UE - Platform - Mobile - Aug 30, 2016The size of packages for HTML5 has greatly increased since 4.10.4 to 4.11.2 and has since increased. Example: First person template, no starter content - size of whole HTML5 folder once packaged: 7 ...
Crash on inputting Scalar Value in Grass Material Node
UE - LD & Modeling - Terrain - Landscape - May 6, 2015Crash occurs when inputting a Scalar Parameter into the New to 4,8 Grass Node. Also reproduced in Main Promotable-CL-2535351 ...
SAnalogSlider moves slowly when step size is large
UE - Editor - UI Systems - Slate - Mar 6, 2024SAnalogSlider calculates FastestStepTime by multiplying the step size value by a constant, resulting in high numbers for larger step sizes. This gets lerped from 1 and used as the repeat time, resul ...
Linux crash when Exporting content
Tools - Jun 2, 2016When the ExportAll window is opened, changing the file type filter and attempting to edit the chosen file field causes the editor to crash. ...
BP timelines: when converting internal curve to external, the external curve isn't used until BP is recompiled
UE - Framework - Blueprint Editor - Aug 28, 2023Blueprint timelines: when converting an internal curve to an external curve asset, the curve asset's data isn't used until the blueprint is recompiled. This is confusing as there is no indication th ...
Setting a struct bool property (bitfield) to itself writes the wrong value
UE - Framework - Blueprint Compiler - Sep 17, 2025There's an issue when assigning a bitfield bool to a native bool in Blueprints. Currently, the engine erroneously treats the memory for a local bool as a uint8 bitfield, which is undefined behavior. ...
CheckCompilingPSOs assert in FMaterialPSORequestManager::MarkCompilationComplete fires occasionally
UE - Rendering - Architecture - RHI - May 17, 2025Find the root cause and fix it. Potential issue based on logs:New RequestA is created in PrecachePSOs and its collection task is dispatched and finishedRequestA is waiting for compilation taskReque ...
SetCollisionProfileName and SetCollisionEnabled aren't working in Construction Script
UE - Simulation - Physics - Dec 5, 2019This is a regression from 4.22.3 (CL-7053642) where this setup executed as expected. Toggling Collision Profiles in 4.23.1 (CL-9631420) and onward do not affect the Static Mesh and it acts as if it ...
AnimNotify triggering all play sounds at once in Matinee Animation Track
OLD - Anim - Jul 21, 2015Placing a series of Play Sound Anim Notifies in an Animation and looping or playing that animation via Matinee multiple times causes the sounds to play all at once at the initial trigger of the anim ...