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

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 ...

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 ...

Editor becomes unresponsive when selecting BP_FirstPersonChracter0 while Playing in Editor with specific settings

This is a regression. Testing //UE5/Release-5.1 CL23901901 When selecting BP_FirstPerconCharacter at run time in a project that has C++, Quality as Scalable, and Ray Tracing enabled the editor free ...

Spawn and Register Tab and Get ID Produces Unbounded Length IDs

Spawning Editor Utility Widgets via Spawn and Register Tab and Get ID inside another widget creates unbounded length IDs that get progressively longer with each subsequent spawn, as the ID is append ...

Customized struct with a TObjectPtr to an EditAnywhere, Instanced UObject does not show in full blueprint editor

A customized struct with a TObjectPtr to an EditAnywhere, Instanced UObject will not show in full blueprint editor. I narrowed this down to the SKismetInspector::IsPropertyVisible method. The prope ...