Unreal Engine Issues
Unreal Engine Issues
Maximum number of State Machine connections?
OLD - Anim - Mar 16, 2015Adding more than 8 connections to or from a state in the state machine results in unpredictable behavior, like causing an animation to fail. (See image.) Was able to reproduce with user's test file ...
UDN 472564 - CurlHttp merges headers on redirect
UE - Online - Dec 7, 2018when curl requests are redirected (301) – response headers are merged together and are comma separated. but, Content-Type headers are required to use semi-colon ";" separators. ...
FStateTreeRunParallelStateTreeTask and TStateTreePropertyRef
UE - AI - StateTree - Dec 2, 2025When using a state tree that has a StateTreePropertyRef as a parameter in parallel any references will fail to resolve using the GetPropertyRef node. ...
[MRQ] Deleting all jobs after rendering queue with executor causes an assertion to fail.
UE - Anim - Sequencer - MRQ - Apr 18, 2022Deleting all jobs after rendering queue with executor causes an assertion to fail. Repro Rate: 3/3 Tested this in //UE4/Release-4.27 @ CL#18319896 by utilizing a For Each Loop and Delete Job node ...
In editor, sub level instance's streaming state persists incorrectly after toggling Level Behavior without saving
UE - World Creation - Worldbuilding Tools - Level Instances - Jun 11, 2025When adding a sub level with world partition streaming to a main level where the streaming is also enabled, setting* Level Behavior* of the sub level to Standalone, and saving the result, in the fir ...
Hot Reload does not update blueprint pins
UE - Gameplay - Blueprint - Jan 15, 2015When changing the variable type or return type of a function in code and hot reload in the editor, blueprints that use the variable/function do not have their pins updated until the editor is closed ...
Editor sometimes crashes when trying to compile an Animation Blueprint that extends a class with AnimInstanceProxy
UE - Anim - Runtime - Anim Blueprints - Jan 10, 2023Reproduced 3/3 times, issue does not occur in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed Regression. Seems to work fine when compiled once, but after the 2nd or 3rd time it crashes. ...
Editor Crashes when spawning a Physics enabled object inside another
UE - Simulation - Physics - Sep 22, 2017Editor Crashes when spawning a Physics enabled object inside another. Regression: Unknown Can Test in Main if requested. ...
[MRQ] Simulating in editor during runtime rendering causes an assertion to fail after rendering is done
UE - Graphics Features - Apr 19, 2022Simulating in editor during runtime rendering causes an assertion to fail after rendering is done. Repro Rate: 4/4 Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did not occur there ...
Crash when Playing in Mobile Preview with Capsule Direct Shadows
UE - Platform - Mobile - Jul 15, 2016When Capsule Direct Shadows are enable, attempting to play in Mobile Preview will cause the preview to crash. ...