Code based BT task breaks after closing/reopening the editor

UE - AI - Sep 9, 2015

A behavior tree task created in code will break in the editor behavior tree. The BTTask node shows as red and says that the class cannot be found. Node must be deleted and replaced to fix the erro ...

Keep Simulation Changes Not Saving Values After Physics Simulation

UE - Gameplay - Blueprint - Oct 1, 2015

Simulating your level and then attempting to use the Keep Simulation Changes option on an actor that has simulated physics gives the No Properties Copied error. Occurs in 4.9.2 binary and Main CL ...

Disabling Editor Sounds Doesn't Prevent Compile Sound From Playing

Tools - Nov 10, 2015

Disabling the Editor Sounds under Editor Preferences->Level Editor->Miscellaneous->Sound->Enable Editor Sounds doesn't stop the Compile sound from playing when you click the Compile button in the ed ...

Compile 'Note' on BP Interface events

UE - Gameplay - Feb 23, 2017

Compile 'Note' on BP Interface events. It happens in actor BPs and also BP Widgets. A similar issue was fixed back in 4.11 with Custom Events. Could be related? https://jira.it.epicgames.net/brows ...

Landscape cooking takes as much as 6 times longer in 4.18

UE - LD & Modeling - Terrain - Landscape - Jan 10, 2018

Some developers are finding that the change to add a bunch of shader types to FLandscapeMaterialResource::GetExcludedShaderTypes() in 4.18.2 increased their project cooking times on PC or console by ...

Inconsistent mobility when converting selected actors to a blueprint

UE - Gameplay - Blueprint - Jan 6, 2015

Noticed when replying to a user on the forums (link included) When using the "Convert to Class Blueprint" feature in the level editor to create a blueprint from the selected actors, the created blu ...

Using the down arrow key in the Toolbar's Blueprints > Open Blueprint Class sub-menu will immediately open the first Blueprint listed

UE - Gameplay - Blueprint - Oct 15, 2015

Using the down arrow key in the Toolbar's Blueprints > Open Blueprint Class sub-menu will immediately open the first Blueprint listed. Reproduced in 4.8.3 binary, 4.10 Preview 1 binary, and Main (C ...

[Audio Modulation] - Ensure is thrown when attempting to modulate a Source Effect at runtime

UE - Audio - Modulation - Sep 6, 2023

Does *not* occur in editor. Only in standalone and runtime. Occurs when modulating Chorus or Bit Depth Also occurs in 5.2 and 5.3. I also noticed the test with this is supposed to set the chorus e ...

Duplicating / Moving (to another level) an actor with a Hierarchical Instanced Static Mesh component causes a crash

UE - Graphics Features - Nov 14, 2016

When you have an actor with a Hierarchical Instanced Static Mesh component that has a Static Mesh set and is populated with at least 1 instance and then duplicate it or move it to another level, it ...

While a Custom Event's delegate pin is connected to anything its details are not visible in the Details panel

UE - Gameplay - Blueprint - Oct 27, 2015

While a Custom Event's delegate pin is connected to anything its details are not visible in the Details panel. Tested with an empty reroute node as noted below as well as a Set Timer node. Reproduc ...