Unreal Engine Issues
Unreal Engine Issues
[Mobile/Forward Rendering] PlanarReflection does not work when the reflection plane faces certain directions
UE - Platform - Mobile - Sep 24, 2025Note: This repros on 4.27 and all 5.x versions. When using the mobile renderer and/or forward shading, Planar Reflection will simply not work if the reflection plane normal has components that add ...
PLCrashReporter iOS Bitcode packaging Error
UE - Platform - Mobile - Mar 6, 2019Unable to package a CPP project with Bitcode enabled Confirmed in 4.23 MAIN @ CL 5291468 ...
Packaging a project to HTML5 and opening the project disables mouse over events
UE - Platform - Mobile - Dec 24, 2015Packaging a game to HTML5 disables the mouse and mouse over events on local host, which prevents any mouse functionality from working in a packaged project. ...
FString.Mid doesn't react appropriately when given negative values for the Count variable
UE - Foundation - Core - Jul 16, 2015If you use a 5 character string (hello) to call the Mid function and provide 0 for start, -1 for count, it'll give you the entire string. This should either return an assert or treat all negatives a ...
Using "Play Animation" node, if current animation has a looping timed particle it will continue playing
OLD - Anim - Jun 24, 2016Calling "Play Animation", if current animation has a looping timed particle it will continue playing ...
FOV only Camera anim is not working as intended.
UE - Gameplay - Feb 6, 2018FOV-track-only camera anim do not give effect to current camera. if the anim have transform track without any key, the anim works. Regression? yes. This is not reproduced in 4.13.2 launcher version ...
ForEachLoop does not save structure changes in the loop body
UE - Gameplay - Blueprint - Feb 2, 2015If a ForEachLoop node is used to cycle through an Array of Structures, using the Array Element output of the Loop node to set the members of the structure does not save the changed values. Workarou ...
Editing InlineEditConditionToggle variable value causes editor to crash
Tools - Oct 7, 2016Editing property with InlineEditConditionToggle meta specifier causes the editor to crash. Workaround: Calling Super::PostEditChangeProperty after property changing code prevents crash from occurri ...
Adding new elements to an array in code does not update in a class based blueprint on compile
UE - Gameplay - Blueprint - May 5, 2015When adding elements to an array inside a code class, blueprint instances of the class do not have their array updated after a hot reload. ...
AR Core - Apps with Candidate image result in black screen on first launch
UE - Platform - XR - Jan 20, 2020On first launch of an AR app with Android the camera passthrough will render black. This also happens if an app is minimized and re-opened. This will not repro if there is no candidate image assign ...