Unreal Engine Issues

Paused Sounds Do Not Have their Channel Map Updated Properly on Device Swap

Swapping between output devices with different channel counts can cause sound corruption for sounds that were paused during the device swap call. More info can be found in the linked UDN, along with ...

When the value of the TMap variable of the child blueprint is changed and compiled, it will restore to the default value of the parent blueprint.

For TMap variables of type struct created in blueprint, if change the default value in child blueprint and compile, it will restore to the default value of the parent actor. This problem does not o ...

Unused parameters listed as used but "found in none"

In material instances with the parent material depicted in the attached image I expected "Param" to be considered as unused since it's attached to Opacity and it's not used (ie not attached to outpu ...

Integrat PhysX crash fixes

iOS: Holding Backspace Does Not Delete Multiple Characters on UMG Text

The iOS Virtual Keyboard has an issue when entering text into a regular UMG text entry field. If the backspace key is pressed and held, rather than deleting all the characters preceding the caret o ...

Curve interpolation settings are forced to change from User to Break when importing animation from FBX in Sequencer

Due to the following code in [Link Removed] (CL-11585172), it is always set to Break even if the Tangent value is continuous. ArriveTangent = LeftTangent * (ArriveTimeDiff); ... LeaveTangent = Ri ...

Tangent is divided twice by Decimal Rate when importing animation from FBX in Sequencer

The cause is that the ImportFBXProperty in MovieSceneToolHelpers.cpp is divided by DecimalRate. ArriveTangent = ArriveTangent / ((Key.Time - PrevKey.Time) * DecimalRate); LeaveTangent = LeaveTange ...

The CVar r.MeshStreaming doesn't influence the DDCKey of staticmesh, but it does for skeletalmesh DDCKey.

Using "Windows + Up Arrow" does not work before clicking window or change inputmode to UI or GameAndUI

"Win and Up Arrow" is shortcut for changing to fullscreen mode, but it does not work properly before clicking window or change input mode to UI or GameAndUI. probably, Win API caused this issue, an ...

Instanced subobject property values nested inside struct members are copied from default data at object initialization time, possibly leading to an EDL error at runtime.

When initializing struct members from default data at UObject initialization time, we are currently copying struct properties that contain instanced subobjects from the default data. This can potent ...