Unreal Engine Issues

Iris - large fast arrays serialize multiple elements when only one is dirtied

This seems to be a result of how the changemask is handled for fast arrays. Because the changemask is a fixed set of bits (defined by IrisFastArrayChangeMaskBits), a single bit can represent multipl ...

WebBrowser widget appears to remove itself from other widgets in user's project

WebBrowser widget appears to remove itself from other widgets in user's project ...

Attempting to rotate a physics actor in blueprints through a custom component does not correctly respond to rotation input

SetRotation in a custom component based on another actor's linear velocity incorrectly updates the velocity of the parent blueprint containing the custom component. This causes sporadic, jittery mov ...

Record with timecode as source but false on start at Timecode causes crash

Widgets remaining in memory after they are removed from viewport

Widgets appear to be remaining in memory even after they have been removed from viewport. A user can use Get all widgets of class to search for a widget (with Top level only set to false) and it wil ...

On clicked events do not appear to be working when packaging for HTML5

On clicked events do not appear to be working when packaging for HTML5 ...

Blueprint Functional Tests Failing When Run Dedicated Server is Enabled

When Run Dedicated Server is enabled, it appears that functional tests are not able to succeed. The following error is appearing in the Automation Test Results: No functional testing script on map ...

Gear VR Touchpad input broken

Gear VR Touchpad input no longer functioning in 4.20 Noticed this appearing in 4.20 logs from device (did not appear in 4.19 logs): LogOcInput: Get touchpad main with data 0.000000 0.000000 Also t ...

CPU Particles spawned through Blueprints do not keep Collision

Particle Systems spawned via a blueprint are not generating collision. The same system will generate collision if placed directly in level. Also reported: https://answers.unrealengine.com/questio ...

Unable to set a BP component field with WithIdenticalViaEquality

There's some quirky behavior occurring with the component's CDO when we change a value that isn't compared by the native code's equality operator. It only seems to commit when we first change anothe ...