Unreal Engine Issues
Unreal Engine Issues
Unable to Create New Niagara User Parameter After Deletion without Niagara Editor Window Restart
UE - Niagara - Scripting - Apr 22, 2024When a user deletes a Niagara User Parameter within the Niagara System editor window, attempting to create a new parameter with the same name immediately after deletion results in an error. Despite ...
Changing bIsSpatiallyLoaded can cause an Actor to be duplicated during Play-In-Editor
UE - World Creation - Worldbuilding Tools - World Partition - Dec 18, 2025Changing bIsSpatiallyLoaded can cause an Actor to be duplicated during Play-In-Editor. As described in the steps to reproduce, if we keep swapping bIsSpatiallyLoaded state and save a Streaming Level ...
Custom Enums break blueprints on hot reload
UE - Gameplay - Blueprint - Aug 3, 2015If a custom code based enum is used inside a blueprint, doing a hot reload will break the nodes by assuming they are of a type other than enum. ...
Calling a Multicast RPC from a Player Controller creates a new Player Controller on the Client
UE - Networking - Jun 3, 2015Calling a Multicast RPC from a Player Controller creates a new Player Controller on the Client. In 4.7.6, this results in a repeating log warning: "LogPlayerController:Warning: Calling IsLocalContro ...
Niagara Dynamic Parameters do not reflect layers in material instances.
UE - Niagara - Jan 19, 2022The names of dynamic parameters in material layers do not seem to update from material instances. ...
CommonUI uses cached geometry that might be zero sized for gamepad focus
UE - Editor - UI Systems - Jan 11, 2023Reproduced 3/3 times, issue also occurs in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed NOT a Regression. Workaround for issue is to have a text box in the vertical box before any buttons; fir ...
Spring Arm Component attached to a Vehicle in a multiplayer environment will cause the Vehicle to jerk forward and backwards
UE - Networking - Aug 11, 2016Spring Arm Component causes vehicle to jerk forward and backwards in a multiplayer environment. ...
When multiple actors are selected, they have different undo behavior in the details panel
UE - Editor - Workflow Systems - Nov 15, 2021When the text in spinbox has focus, it doesn't get the change notification externally. It may also be worth noting that ctrl z or ctrl y also do not get bubbled up to undo the text box values. It a ...
Updating Material does not update platform stats in derived Instance
UE - Rendering - Architecture - Materials - Nov 26, 2024It would seem that updating a material does not update the associated platform stats in a material instance editor, only the parameters. Can workaround by manually invoking shader compile in the ma ...
Skylight Leaking Tint in Reflection
UE - Rendering - Graphics Features - Oct 10, 2025From 5.6 onwards, Skylight Leaking is much stronger in reflections than in the world. Also tested on //UE5/Release-5.6, CL 45232827 ...