Unreal Engine Issues

Component Created in C++ is destroyed before BeginPlay

Tracking a potential issue where components in C++ are being "lost" prior to BeginPlay. Renaming the reference variable seems to work around the issue, but the cause is currently unknown/needs more ...

Editor crash on Instanced Subobjects of an outer class in Class Picker

Static mesh components spawned in the UCS along a spline require lighting to be rebuilt after a map reload.

Seems to be somehow related to components being instanced in the Construction Script according to a spline. The transforms are slightly off by more than 1.e-2f. They are reconstructed on load with a ...

Changing the name of a native component results in a blank details panel

Much like [Link Removed] (which I'm backing down on my by design claim), there is an issue where if you previously referenced a component that no longer exists, the correct instanced subobject is lo ...

Non instanced subobject gets set to none after compiling editor

Non Instanced Subobject sets to none after compiling the blueprint. Please see attached video for more details. Checking regression in 4.26 now ...

Intermittent fatal assert in GetArchetypeFromRequiredInfoImpl for an object with RF_NeedLoad

The archetype instance for the ProceduralMeshComponent's physics data object is not flagged as such, so the event-driven loader does not designate it as a preload dependency, which may be putting us ...

Blueprint class's property is overridden by parent blueprint class

I did some research. The problem is caused in CoreNative.cpp. In Function GetInstancedSubobject (Line 126) We should check if instance is runtime instance first. If it is runtime instance, just us ...

Packaged Paper2D game using Flipbooks crashes when opening Level

Paper2D game using Blueprint Actor with Box Collision and Flipbook Component crashes frequently when loading levels in packaged Development Build. Reported and tested in versions 4.25.3(CL 139427 ...

Actors are not properly restored when undoing a Replace Selected Actors transaction

When undoing a Replace Selected Actors operation, the resulting actor is corrupt and triggers an ensure where the root component is in the process of being destroyed. This is a regression that poppe ...

Instance components duplicated via the in world component editor are destroyed on level reload

Instance components aren't flagged correctly and are removed on load as a result. ...