Selecting multiple actors with differing DataTableHandles causes data loss

UE - Gameplay - Jan 4, 2021

The data table customization (and probably others) tries to aggressively clear out row references that are not valid in the table they point to. This breaks when selecting multiple actors or objects ...

Post Process AnimBP is no longer initialized in Persona Viewport

OLD - Anim - Jul 20, 2017

Post Process AnimBPs used to be processed in the persona viewport. This could have been intentional. Occurs on? 4.14 - 3249277 - NO 4.15 - 3450819 - YES 4.16 - 3466753 - YES 4.17 - 3545186 - YES ...

Camera attached to a Spring Arm jitters when put at a +90 or -90 degree angle on the Y axis.

UE - Gameplay - Nov 18, 2016

When a camera attached to a spring arm is turned at a +90 or -90 degree angle in the Y Axis (can't go any further) and turned, it can jitter and cause visual issues. Note: This occurs in the base ...

Shadow Quality regression on mobile for Movable Directional Lights

UE - Platform - Mobile - Oct 11, 2016

Shadow quality from a movable directional light has lower resolution quality than the previous release of the engine. This is a regression in quality from 4.12.5 to 4.13. Tested with: Good Quality ...

MediaFramework movies not playing properly in Shipping

Media Framework - Nov 7, 2017

`check(Samples.Pop());` this kind of `Pop()` inside of a `check()` is in a few places in MediaSampleQueue.h and MediaSamples.cpp but `check()` expands to nothing in Shipping/Test, so, required work ...

Engine\Build\IOS includes an expired certificate

UE - Platform - Mobile - Jan 2, 2019

\Engine\Build\IOS\AppleWorldwideDeveloperRelationsCA.pem is out of date. This causes a warning to appear when submitting app.  Workaround: Install latest WWDR ( https://answers.unrealengine.co ...

Suspension CoM calculations don't update with mass.

UE - Simulation - Physics - Dec 15, 2016

UWheeledVehicleComponent calculates the Suspension settings only when the physics state is first created. When CoM is set through the editor, the vehicle is constructed with the appropriate offset ...

Lighting Build Fails With High Density Foliage

UE - World Creation - Worldbuilding Tools - Foliage - Jan 16, 2018

Trying to build lighting on a map with high density foliage will fail lighting build or cause the editor to crash. This occurs in 4.15, 4.16, 4.17, and 4.18. There have been multiple reports of this ...

Chained physics constraints do not work correctly when one constraint is limited

UE - Simulation - Physics - Aug 12, 2017

A chain of physics constraints that includes a physics constraint that is set to Limited does not work correctly. When collision occurs, the attached actors start moving erratically. Regression?: N ...

Children of Retainer Box cannot be interacted with when visibility is set to "Self Hit Test Invisible"

UE - Editor - UI Systems - Jun 19, 2017

When there is a Retainer box with the visibility set to "Self Hit Test Invisible" and has children, the children cannot be interacted with. Children such as a button cannot be clicked. This issue c ...