Unreal Engine Issues

Compiling blueprint component can lose data on instances in level

Compiling a blueprint component can cause data loss on instances in the level when the component instance overrides its owning Blueprint's property value overrides back to the component archetype's ...

Reference to BP enum is not saved on integer bitmask types if the default value is "none"

Unable to multiple a Vector2D with a float in Blueprints

Reported by licensee: [Link Removed] In UE4, we used Multiply_Vector2DFloat as the underlying function for this operation. In UE5, we're relying on promotable operators to the work. However, that o ...

Enable "Set members..." support for vectors and similar structs

Currently, structs that have a custom make function aren't able to use the "Set members..." node in Blueprints. For vectors and similar structs, this is slightly inconvenient since it requires using ...

Unable to bind Float variables to certain properties in Widget elements

Unable to bind float variables to certain properties in Widget elements. You are able to bind Structure floats if needed as a workaround. Repro Rate: 3/3 Tested this in //UE4/Release-4.27 @ CL#183 ...

In blueprint component details not showing after changing component class

It was noticed that after changing the class of the component and restarting the editor, the Detail panel is no longer displayed, which makes it impossible to work with it. Repro Rate 5/5 Regressi ...

Adding a new macro to a Blueprint Macro Library after renaming the first macro causes a crash

It seems the editor crashes when adding a new Macro to a Blueprint Macro Library. This only occurs if you rename the macro that gets automatically created when you open the macro library to somethin ...

Adding an output to the default function of a Blueprint Interface now requires the Interface to be compiled in order to change the output's values

In 4.27 immediately upon adding an output to the default function that output can be edited without needing to be compiled. In Preview 2 once an output is added the Blueprint Interface needs to be c ...

Delegate fixup doesn't work when bound functions are not in the current BP

When BP functions are bound to native delegates with float parameters, we perform fixup on the BP functions such that their float parameters are converted from double precision to single precision. ...

Memory leak when using Blueprint Debugger while inspecting a return value

Potential memory leak when using Blueprint Debugger to inspect a return value multiple times while playing. User also reported this would cause a crash, but I didn't try to max out ram usage to trig ...