Unreal Engine Issues
Unreal Engine Issues
Some debug modes do not work in PIE
UE - Platform - Mobile - Jan 9, 2024It looks like the output of the debug pass is ignored, and the final output from the last frame before the pass was enabled is displayed instead. If the pass is modified to return a different textu ...
Blueprint Diff doesn't find the difference in changed Child Actor Components in duplicated Child Actors
UE - Gameplay - Blueprint - Feb 2, 2017Blueprint Diff doesn't find the difference in changed Child Actor Components in duplicated Child Actors. This seems to be contained to Child Actor Components that are inherited by a Child Actor Clas ...
LOD glitch when using Control Rig with Import Skeleton node
UE - CAPT - Control Rig - Aug 26, 2025In Unreal Engine 5.6 and Main, a glitch occurs when switching between LODs in a character setup that uses a Control Rig to dynamically load the skeleton hierarchy through the Import Skeleton node in ...
Apex Cloth will not render correctly with cloth assigned to multiple materials
UE - Simulation - Physics - Character - Nov 12, 2015Apex cloth material assigned to multiple material elements will not render correctly in Persona or when PIE/Simulate in the editor. Any material element other than element 0 will be masked/invisible ...
Is Playing can return false on Sequence's second playthrough
UE - Anim - Sequencer - Apr 12, 2021Playing a sequence more than once will have an incorrect player status on the first frame. ...
AttachChildren on the client can lose entries
UE - Gameplay - Jan 26, 2016If a client attaches a scene component to a server authoritative scene component and that server component later has a change in attachment made on the server, the AttachChildren array on the client ...
Refraction breaks Translucent Sort Order without Separate Transparency Enabled
UE - Graphics Features - Jan 6, 2016With multiple Translucent Material sorted in 3-D space or via Transparency Sort Priority, if one of the materials uses refraction it will render on top of the others no matter position or sort prior ...
Server crashes when client connects after Server has reloaded a sublevel with a deleted actor
UE - Networking - Jul 13, 2017UNetDriver::DestroyedStartupOrDormantActors maintains a list of deleted startup (and dormant) actors. This is used to notify clients that have joined the server of Actors that need to be destroyed ...
Sky Lights don't effect Translucent materials
UE - Rendering - Architecture - Materials - Nov 21, 2022Regression: Tested in UE5/Release-5.0, this issue does not occur so it is a regression Appears to be an issue with Lumen and Skylights with Cubemaps. Directional lights, point lights, etc. all work ...
Vector Field Initial Rotation will always have the same initial rotations for each emitter instance
UE - Niagara - Nov 11, 2019The Vector Field Initial rotation module will have the same rotation for all instances of the same emitter. This is a regression from 4.22. ...