Unreal Engine Issues
Unreal Engine Issues
World Partition Editor minimap build failed
UE - World Creation - Worldbuilding Tools - Aug 10, 2023The issue was reproduced when building a minimap for an open world level with no Actors with "Is Spatially Loaded" enabled. Placing additional Actors with "Is Spatially Loaded" enabled in the level ...
ChaosCacheManager is not reproducing Collision Events the second time you Record and Play
UE - Simulation - Physics - Mar 28, 2025ChaosCacheManager (CCM) is not reproducing Collision events the second time (and onwards) we record a Geometry Collection (GC) breaking session. Particles set to track Collision Events correctly fol ...
Sequence with Override Instance Data enabled and a SubShot will accumulate the TransformOrigin Location wrongly and overshoot the expected end position
UE - Anim - Sequencer - Mar 28, 2025A Sequence with Override Instance Data enabled and a SubShot will accumulate the TransformOrigin Location wrongly and overshoot the expected end position. The licensee has encountered a particular s ...
Connecting a Client to a Server in PIE with Auto Connect to Server disabled will crash the editor
UE - Networking - Feb 22, 2016Connecting a Client to a Server in PIE with Auto Connect to Server disabled will crash the editor. EDIT: simple test project attached. Make sure Auto Connect to Server is disabled, and PIE with 2 p ...
Using High Resolution Screenshot while the viewport is in Full Screen causes massive performance issues after the screenshot is successfully taken until the Editor is restarted
UE - Graphics Features - Jan 6, 2022This is a regression. Maybe Binary only if it hasn't already been fixed. Tested in:StreamCLTypeResults//UE5/Main18386535PerforcePerformance is normal after screenshot//UE5/Main18218925Perforce Per ...
The Find Node Can Crash on Compile After a Blueprint Compile Error
UE - Gameplay - Nov 21, 2019The "Find" node can cause a crash if the a map with a struct value changes type while connected, is disconnected and reconnected. Compilation fails and crashes the engine. Found in 4.23.1 CL#963142 ...
Translucent Wireframe Materials Exhibit TSR Aliasing/Crawling Due To Incorrect Velocity Rendering When Set to Output Depth And Velocity
UE - Graphics Features - Nov 27, 2025Note that this bug potentially also affects a wide variety of material / geometry setups; however, a translucent wireframe setup is currently the main reproduction case. The issue may also be notice ...
Crash when element is added to a map variable with unhashable key
UE - Gameplay - Mar 21, 2017Crash when element is added to a map variable with unhashable key. An error is thrown on compile but an element can still be added under the Details panel of the variable. Crash Reporter: [Link Rem ...
Physics objects will bounce unrealistically just before coming to rest
OLD - Anim - Jun 5, 2017Physics objects will bounce unrealistically just before coming to rest. This is most noticeable with the large cube in the 1st Person template project. It also happens with the smaller cubes but not ...
Virtual Memory leak when using specific rendering settings in the template project
UE - Rendering Architecture - Dec 20, 2025When a project is run with these settings in a template project, untracked virtual memory increases. Cvars r.GBufferFormat 3 r.Lumen.TraceMeshSDFs 1 r.Lumen.TranslucencyReflections.FrontLayer.Enab ...