Unreal Engine Issues

Custom Events with duplicate input names will not compile

Custom Events with duplicate input names will not compile. This does not occur immediately: creating two Custom Events with two identically named inputs will not cause a compile error, but if you re ...

Overridden Interface Functions in Child BPs lose array output pins after closing/reopening the project and become invalid

Overridden Interface Functions in Child BPs lose array output pins after closing/reopening the project and become invalid. Reproduced in Main //depot/UE4/Promotable-CL-2434822 ...

UMG Throbber is not showing in project when using 'Set Number of Pieces' node off of Event tick

If you add a throbber to a UMG Blueprint and use the Graph of the Blueprint to change the 'Set Number of Pieces' and use 'Event Tick' to tick the widget, the throbber widget will not appear on scree ...

Post process settings struct will not open/break to adjust individual settings

attempting to break the post process settings struct or split a post process settings struct pin causes pin to disappear, leaving a blank target node. ...

Renaming Blackboard Key Not Updating Behavior Tree References

When renaming a blackboard key using the Entry Name box in the key's details panel, the names of the references in the behavior tree are not updated automatically. This is inconsistent behavior be ...

Replacing Selected Actors does not replace all references.

When using the "Replace Selected Actors with" feature in the editor, references to the replaced actor are not updated to reference the new actor (where valid). They will appear to be replaced until ...

BC7 Format in Texture Asset Mip Maps are not correct

When enabling BC7 compression format for a texture in a project that has SM4 disabled will result in the last two Mip Levels being gray. This happens on any texture size. The number o mip levels may ...

No warning is shown when a disabled mobile shader permutation is required for rendering

bIsComposing assert with Japanese MS-IME input(candidate list related)

When using MS-IME as Japanese input method, scrolling out the text field out side the view causes bIsComposing to be set false - this state causes instability of the editor. Crash happened with Win ...

Incorrect usage of FText in EnsureMsgf does not trigger a compilation error, leads to crash in shipping

Using incorrect formatting in FText does not cause compilation errors in EnsureMsgf as it does in other functions such as UE_LOG. This causes crashes to sneak through such as a crash on ensure when ...