Unreal Engine Issues

[CrashReport] UE4Editor_Engine!FViewMatrices::FViewMatrices()

This is a trending crash in the 4.17 previews. Unfortunately users have not provided any descriptions of their actions when the crash occurred. Source Context 464 FViewMatrices::FViewMatric ...

Draw as border is completely opaque when size in negative

When an image widget is set to draw as border it will no longer render as a border if the size is negative. The widget appears completely opaque. ...

GetAllMobileRelevantLayerNames drops those layers which are only connected to RuntimeVirtualTextureOutput Node

in UMaterial::GetAllReferencedExpressions, the mobile branch ignores every CustomOutputExpressions including RuntimeVirtualTextureOutput. ...

Fix up IOS errors calling UI API from non-UI threads

Ensure after reparenting Blueprint and moving a property to the new parent

Moving a property from a recently reparented BP to its new parent will assert in  FBlueprintCompileReinstancer::MoveDependentSkelToReinst at  ensure(PrevStructSize == NewStructSize) This only see ...

A niagara emitter with an empty renderer module does not return a position in the package

FBX import freezes in DataPrep

FBX file import freezes UE while trying to import into DataPrep by the Interchange importer. The import will start, but then a message will pop up stating "Creating snapshot of world content ... " ...

Chaos Mover crash in standalone editor client

When using the Chaos Mover with resimulation enabled, standalone editor processes running as a client will crash around 80% of the time upon startup. ...

Unreal Editor can get in an infinite while loop when checking the History of an asset under Perforce.

Unreal Editor can get in an infinite while loop when the action Asset->Source Control->History is used in a Blueprint Asset. Reportedly, this issue is only encountered when using the Branches featur ...

Crash after changing either the Anim Start or End times of an Animation Composite

This is a regression tested in //UE4/Release-4.27 CL#18319896 Crash after changing either the Anim Start or End times of an Animation Composite when using Enter to confirm their value. ...