Unreal Engine Issues

GPU Particle Collision changes based on Normal Intensity on Colliding Surface

Increasing the intensity of a Normal Texture on a colliding surface will cause the collision of GPU particles to behave strangely, looks to be falling through floor, when you are using a Constant Ac ...

Native struct types that declare one or more non-UPROPERTY fields are not initialized with the default value from a modified Blueprint CDO.

Dynamically-spawned instances of a Blueprint class go through an optimized property initialization pass (see UBlueprintGeneratedClass::BuildCustomPropertyListForPostConstruction() and InitProperties ...

int64 UProperty with ExposeOnSpawn meta tag won't compile.

int64 UProperty with ExposeOnSpawn meta tag won't compile from a C++ UUserWidget class. ...

Custom events with a struct that has had its pin split will throw an error when adding variables to the blueprint

Custom events with a struct that has had its pin split will throw an error when adding variables to the blueprint. The Struct appears to throw an error when making changes that are seemingly unrelat ...

Crash When Toggling Visibility of Level with Planar Reflection

This crash occurs in 4.19 and 4.20 but not 4.18. Repro'd in 4.19.0-3944462 and 4.20.0-3955769 and 3964322. This is a regression. Per UDN licensee: When I'm showing/hiding levels in editor (in le ...

The base color of a material in unlit mode changes when specular amount is above 0.0

Material's RGB base color values are changed in Unlit mode when specular is greater than 0.  User repro video:  [Link Removed] Tested in: 4.23.1 CL#9631420, 4.25 CL#11574810 ...

Streaming a Widget Class with Remote UMG displays the NO SIGNAL slate on remote devices

Layered blend per bone node with blend mask setting in an animation BP will not work after restarting UE editor, until recompiling the anim BP manually.

Teleport node sets the movement mode for a pawn back to default

Teleport node sets the movement mode for a pawn back to default. The current movement is overridden by the default after using teleport node ...

Light shaft bloom produces heavy flickering when offscreen

See attached video. Happens always in editor, will also happen in standalone game but only if viewport rect has not the full window size. The issue was not present in 4.22. Update 1/22/20:  A ...