Unreal Engine Issues

Packaging fails when nativized blueprint implements interface with virtual function

If an interface contains a virtual function that returns "nullptr", If an interface contains a UFUNCTION that has a TSubclassOf type as a parameter or return value, implementing the interface in a b ...

Transform key time isn't accessible in the Property editor for keys

Crash occurs from change of inner struct value with TMap variable of outer struct

A crash occurs from the change of inner struct value with TMap variable of an outer struct. This crash does not occur if you change the variable type as a substitution for the last step. Regression ...

Crash Occurs Enabling new Audio Mixer with Audio Devices Disabled

If a user has all their audio devices disabled, and then enables the new audio mixer for 4.16, a crash occurs when trying to launch any new or existing project. This is a regression as this crash d ...

DeltaTime returns inaccurate time when Tick Interval is positive

When disabling/enabling tick at runtime, if (TickInterval == 0) then DeltaTime returns as the length of a frame, but if (TickInterval > 0) DeltaTime returns as the length between when tick was disab ...

Defaults aren't saved for spawnables when being destroyed

Engine crash from opening level bounds blueprint after project reopens

There is a crash that is occurring when a blueprint with the parent of "Level Bounds". The crash occurs when the project is closed and reopened. Opening the blueprint immediately after it was create ...

Crash When Selecting Actor in the World Outliner That is Using ColorGradingMode

When selecting an actor in the World Outliner that is using the ColorGradingMode specifier (ColorGradingMode = "saturation"), the editor crashes. This did not occur in 4.15.3. This is a regression ...

Merged static mesh doesn't maintain scale if created using the AddStaticMeshComponent node

Merged static mesh doesn't maintain scale if created using the AddStaticMeshComponent node. User Description: The second thing: My workaround for that is to create a tiny triangle mesh with simple ...

Editor crashes when opening a project that includes a plugin with more than two custom Volume classes

Adding more than two custom Volume classes to a plugin results in any project that includes that plugin crashing when opening it in the Editor. There does not appear to be a problem with adding thre ...