Unreal Engine Issues

World Initialization is performed on Transition World if the client's process is halted at a certain point

A user reported an issue where, if a client hitches during world transition, the client will continue referring to the transition world instead of the newly created one. This will result in the clie ...

Mesh painting on staticmesh doesn't always apply Colors to All LODs

See the video [Link Removed] ...

Sequence with Override Instance Data enabled and a SubShot will accumulate the TransformOrigin Location wrongly and overshoot the expected end position

A Sequence with Override Instance Data enabled and a SubShot will accumulate the TransformOrigin Location wrongly and overshoot the expected end position. The licensee has encountered a particular s ...

Ensure triggered upon improper math expression

An ensure is triggered upon entering an improper math expression. ...

GameThread + AsyncLoadingThread deadlock - StaticLoadObject vs. StaticAllocateObject

User reported encountering a deadlock between GameThread and AsyncLoadingThread and provided two callstacks.User quote I've been running into a deadlock intermittently with a custom blueprint conso ...

Creating a new C++ Synth Component results in a failed compile linker error.

Upon creating a new Synth Component C++ Class in Unreal 4.24, the compiler will fail to compile with a Linker error. ...

Crash when creating a level sequence player after a level begins its tear-down

It's possible to create a level sequence player in a level that's being torn down. Event end play is one example, but the original report comes from a situations that's harder to avoid. Creating a l ...

D3D12 Does Not Correctly Validate Static Uniform Buffers Correctly

When adding a Uniform Buffer Struct that has one 4x4 matrix to a mesh pass, validation will fail, due to a Uniform Buffer Struct mismatch. This can be reproduced by adding a mesh pass in project-si ...

Editor asserts when deleting a morph target from a skeletal mesh

TAttributeContainer::CopyFrom crashes when container contains invalid bone indices for active mesh

Currently there's no validation within the animation attribute container that bone ids are valid.  This means that client/game code can add attributes with invalid bone ids into the container and th ...