Unreal Engine Issues

Lightmap UV generated on Windows and Mac is not deterministic

Client disconnect during seamless travel results in incorrect NumPlayers and NumTravellingPlayers

This issue seems to stem from HasClientLoadedCurrentWorld returning true in AGameMode::RemovePlayerControllerFromPlayerCount. When removing a player controller, the GameMode checks if a seamless tra ...

Spawnable Post Process Volume does not draw bounded values after saving and reopening a level

Reproduction Attempts: 3/3 Doing some additional testing for Spawnable Post Process Volumes in a level sequence, the PPV does not appear after saving the level and level sequence, closing and reope ...

UHapticFeedbackEffect_SoundWave Initialize does not populate Raw Data in the HapticsBuffer

From the UDN:  >  Open HapticsFeedbackEffect.cpp and naivgate ~ line 150; note HapticBuffer has length populated but never write the actual buffer data. LikeReplySelect as Best Seems like a simple f ...

Objects that return false for NeedsLoadForClient not loaded on listen servers

For instances that are not a dedicated client or dedicated server (e.g. packaged games with TargetType "Game"), GIsClient will be true, but GIsServer will be false. This leads to objects that retur ...

FNetGUIDCache warning when attaching non-replicated component to a replicated scene component

When the replicated scene component's AttachChildren array is replicated, the package map attempts to serialize the non-replicated component, causing the warning that the object is not supported. ...

Scalebox scaling won't update if child size changes with global invalidation enabled

When global invalidation is enabled, Scale Boxes don't react properly to changes in the size of their contents. Licensees have worked around this by updating SScaleBox::OnArrangeChildren:// This sca ...

Imposter renders incorrectly in PCG volume after updating to 5.4

The last level of impostors in PCG volumes render incorrectly after updating from 5.3 to 5.4. ...

Reliable subobject creation bunch may overwrite previously received property on the actor

This seems to occur because of how reliability and the retransmission of dropped data is handled in the engine. If a reliable bunch is dropped, the entire bunch will be resent, but any unreliable bu ...

Join in progress clients won't receive that a net startup actor is hidden

This seems to be because IsNetRelevantFor checks if the actor is hidden, resulting in a hidden actor not being considered relevant to clients. However, if it is a net startup actor, this will result ...