Unreal Engine Issues
Unreal Engine Issues
Crash when splitting a UDS pin on a collapsed graph
UE - Gameplay - Blueprint - Jan 27, 2017I came across this bug while attempting to verify UE-41073. That bug is verified, but I accidentally added the struct into the collapsed node without going into the collapsed graph and split the col ...
Assertion fails when a struct is opened with a BP class reference stored and with that struct as a variable in the BP class that's referenced.
UE - Gameplay - Blueprint - May 10, 2022Assertion fails when a struct is opened with a class reference stored and with the struct as a variable in the class that's referenced. A restart is required in order to see this occur. Repro Rate: ...
Opening Materials and Material Functions with Vertex Interpolator node Results in Crash
UE - Graphics Features - May 23, 2018Per Licensee: Hello, We are migrating our project from 4.18 to 4.19.2 and we are encountering various crashes while opening our material and material functions. I'm adding a simple test case here. ...
Ensure when opening Camera Anim assets for the second time
Tools - Aug 21, 2016An occasional ensure is thrown when opening Camera Anim assets. Generally, the issue occurs when opening the asset for a second time, but the repro rate is low, around 1/5. ...
Crash when opening a blueprint that referenced a struct blueprint that no longer exists
UE - Gameplay - Blueprint - May 28, 2015If a user creates a struct blueprint then references it in another blueprint and then deletes the struct while the editor is closed, the referencing blueprint will crash when opened. ...
Attaching a removed Actor in Sequencer causes a crash
UE - Anim - Sequencer - Jan 6, 2020This is a regression from 4.23.1 (CL-9631420) where Sequencer just displayed the re-attached binding in yellow text instead of crashing. The user suggests that the deleted actor should be removed fr ...
Setting the name of a State or Conduit node to an extremely long string causes a crash
OLD - Anim - Mar 22, 2018Setting the name of a State or Conduit node to an extremely long string causes a crash This issue is not a regression. ...
Ensure triggered in FBoundsCacheElement::GetValue when adding ISM instances in Construction Script
UE - AI - Oct 8, 2025An ensure is triggered in FBoundsCacheElement::GetValue when adding instances to an InstancedStaticMeshComponent inside a Blueprint’s Construction Script. This occurs when the ISM component is navig ...
Ensure caused by edits to nested structs
UE - Gameplay - Blueprint - Dec 27, 2016Edits made to a struct that is a member of another struct can cause the parent struct to no longer compile and cause save errors. ...
Crash upon diffing Blueprint that was reparented when its previous parent has already been deleted
UE - Gameplay - Blueprint Editor - Sep 20, 2017When attempting to diff a Blueprint that has been reparented when the previous parent no longer exists in the editor, a crash occurs. The crash is due to the editor attempting to reference the delet ...