Unreal Engine Issues

UbaAgent in 5.7 depends on qwave.dll, which is not available on Server Core

A licensee runs UbaAgent on Windows Server Core. This worked in 5.5 and 5.6, but broke in 5.7. After some investigation, they found that UbaAgent took a new (hard) dependency on qwave.dll in order ...

Controller Mapping/Unmapping on some platforms is not ideal for local multiplayer

[Link Removed] The workaround is as I posted in the UDN, to override the viewport client or to make a custom slate input mapping to change this behavior. But, there is a bug with that unmapping/l ...

Inline retargeting gives different output pose vs retargeting from mesh

When we perform a retarget from an input pose rather than another mesh, the transforms within the anim bp have already been conformed to the target mesh by translational retargeting and compatible s ...

[AI] SmartObjectPersistentCollection produces errors during Map Validation

SmartObjectPersistentCollection in 5.6 and later now give errors when the map validator runs due to referencing spatially loaded actors. This was working per licensee in 5.5. There was a change from ...

Motion warping doesn't enable if a target is added on frames subsequent to the start of the warp notify

The issue is that URootMotionModifier_Warp::Update will disable the warp if there is no target found for it. But there's no functionality to turn the warp back on if a target is then set on a later ...

Iris - Server fails to send client initialization RPCs after seamless travel if the client finishes travelling first

During seamless travel, when a client loads into the destination level it will call APlayerController::ServerNotifyLoadedWorld, including when it finishes the travel before the server. When the serv ...

Skeletal Meshes created in Unreal with only a root bone do not export correctly

Can not paint vegetation with brush diameter of 1m or less

Unshelving a file from Unreal locks unreal. Killing process leaves the file locked and can't be checked out

Unreal currently locks any assets that are loaded. Actions such as "revert" from within the editor handle this properly by unloading the asset but unshelving from within the editor does not respect ...

Remote members not correctly removed from lobby

While the OnLobbyMemberLeft event does seem to be fired correctly, the remote member will still be in the lobby's "Members" map, and its data can still be found in FLobbyClientData::MemberDataStorag ...