Unreal Engine Issues

Preformance drop when calling draw to render target

There is a major performance drop after 4.18 when calling draw material to render target. This is an issue reported by many community members, and there seem to be additional reports with different ...

Parser drops Braces unexpectedly when copy pasting Nodes

InString with Curly brackets are copied to clipboard as DefaultValue="\"{Hello}\"", and the pasted result does not include the Curly brackets. "Brace drop itself is happening in FParse::Li ...

Tracks referencing the same sequencer don't work properly in package build

This issue is regression. It don't occur with 4.18.3. Sequencer behavior differs between PIE and package build. As shown by the attached .png, in PIE one character moves, but in package build it ap ...

Crash when trying to "Update Mesh Section" on any procedural mesh just after "Clear Mesh Section" and "Create Mesh Section" for different vertices and triangles.

the editor Crashes when trying to "Update Mesh Section" on any procedural mesh just after "Clear Mesh Section" and "Create Mesh Section" for different vertices and triangles. Found in 4.19 CL# 4033 ...

GameplayTag Query on Component Instance resets when reloading level

GameplayTagQuery variables - when inside of a component, are not saved. User notes: "Note that this does not occur if the ActorComponent is added in code in a native actor and that the actor at S ...

Crash when using Find in Blueprints with String Table references

Crash in UEngine::TickWorldTravel

In UEngine::TickWorldTravel, in between calls to LoadMap() and LoadMapCompleted() it is possible that an error causes PendingNetGame on the world context to be nulled out (presumably by CancelPendi ...

Delay nodes occasionally don't fire the "Completed" output in a nativized build.

This happens when the 32-bit LatentUUID signed integer that we generate for the delay node starts with "-1" when converted to an FString (e.g. "-1824950080"). During compilation, we pack latent fun ...

FQuat::NetSerialize modifies the original value which can cause it to be replicated continuously

FQuat::NetSerialize will always call Normalize() as part of replicating the current value, so that only the X, Y, and Z components need to be serialized (the W can be computed on load). This operat ...

Warnings Log spam when pasting a widget into any panel widget

An increasing amount of warning show up in the output log as a widget is pasted into a name space that is part of a widget that has been added to another widget via the user created section. Examp ...