Unreal Engine Issues

PIE window resizes on launch when using Windows scaling

The user suggested scaling the TitleBarSize in SWindow::GetClientRectInScreen by GetDPIScaleFactor(), which makes sense to me but doesn't seem to solve the issue entirely. ...

Iris - check hit in FNetBitStreamWriter::InitBytes if object has only COND_InitialOnly replicated properties

InitOnly FReplicationStateDescriptors will have a value of 0 for ChangeMaskBitCount, so if an object only has COND_InitialOnly properties, its FReplicationProtocol will also have a ChangeMaskBitCoun ...

Level and Blueprint viewports have different behavior when calling FComponentVisualizerManager::HandleClick

User reports a difference in how component visualizer clicks are handled in editor vs blueprint viewports. This is likely not intentional, just a case of a difference in control flow in each viewpor ...

Unloading a level instance by data layer creates empty folders in the top level of the outliner

Reset to default behavior for arrays is inconsistent about updating customized struct headers

The behavior for resetting the default for customized struct properties is inconsistent and needs to be reviewed and fixed. Currently we see this behavior:In non-array properties, the header will be ...

Keep Simulation Changes Applies to Incorrect Actor with Sublevels

When setting properties and saving simulation changes, EditorUtilities::GetEditorWorldCounterpartActor and EditorUtilities:GetSimWorldCounterpartActor functions seem to get the wrong actor. Actors i ...

Inconsistent media texture new style output state across the engine

A simple search for `NewStyleOutput = true` will reveal the many instances where this flag is already forced on, including media plates and media bundles. This however means that we have incompatib ...

Movie Scene Capture - DX12 Render Artifacts and Delay

If using the Legacy renderer (Movie Scene Capture) with DefaultRHI DirectX12, there's new delay and also some frames get weird artifacts.   However, the delay and artifacts do not appear when using ...

VerboseCookerWarning warnings: Saving object into cooked package %s which was created at cook time, Object Name UniqueObjectNameForCooking_0, Full Path %s, Outer class %s

Creating objects at cook time that are exported into the cooked package is a possible cause of indeterminism, and therefore we have banned it in engine classes and will fire a warning about it. Cur ...

Gameplay effect modifier tag requirements are not checked for Instant/periodic effects

When creating a GameplayEffect, modifiers can tag requirements for the Source and Target tags. For Duration gameplay effects, these tag requirements are checked from FAggregatorMod::UpdateQualifies ...