Unreal Engine Issues

If the entry of State Machine of AnimBP directly connect a state which has another state machine, a crash will occur when changing parameters of AnimBP

If you directly connect a state which has another state machine to the entry of State Machine of Animation BP, a crash will occur when changing parameters. If you connect an empty State to an Entry ...

Successive Play in VR sessions are causing Editor hangs on Oculus when "Run Dedicated Server" is enabled

when playing in VR Preview with Run Dedicated Server enabled, successive PiVR sessions are causing extreme editor hangs, up to ~30 seconds This appears to be exclusive to VR ...

Expandable Area does not respect scrollbox boundaries unless set to fill

There is an issue where Expandable Area does not respect scrollbox boundaries unless set to fill. This occurs when the scrollbox is a child of another component. This issue does not appear to be a r ...

Crash Occurs When Actors are Attached Across Persistent and Sublevels When Levels are Saved

Can attach actors to each other through the use of sequencer even though actors are in different levels which leads to crashing when saving and changing levels F3DAttachTrackEditor::IsActorPickabl ...

[Rhino Reimport] - Scaling an object inside rhino and re-importing in Unreal dup staticmesh actors

DirectX Tesselation Crash

Per UDN Licensee: I have 2 crash repro when enabling DirectX12, both linked to tesselation and still present in 4.18 stock engine and easy to reproduce. Crash 1 -Start editor with DirectX12 -Cre ...

Landscape Change Component Size Tool removes foliage from landscape

Foliage painted onto a landscape will disappear when Sections per Component is changed from 1x1 to 2x2. Affects 4.17.2 CL 3658906, 4.18.2 CL 3794801, 4.19 Main Possible Workaround is to set the Re ...

UWorld::RemoveFromWorld does not check Pointer Reference for null before use

The code in UWorld::RemoveFromWorld that removes Pawns that are about to be streamed out does not check to see if the pointer that it sets is null prior to using it. In cases where Pawns are rapidly ...

Possible incorrect pointer manipulation in BeginPackageCacheForCookedPlatformData

In UCookOnTheFlyServer::BeginPackageCacheForCookedPlatformData(), there is a pointer to int32 called CurrentAsyncCache that is used as an index. It's value is dereferenced before it is checked, but ...

Sequencer spawned blueprint functions/variables not firing with correct values on begin play

Created in relation to https://udn.unrealengine.com/questions/405764/is-it-possible-to-set-sequencer-spawnables-propert.html Issue relates to behavior of the Event BeginPlay and the propagation of ...