Unreal Engine Issues

OSSNull doesn't properly filter servers based on settings

OSSNull doesn't properly account for bShouldAdvertise or bAllowJoinInProgress. These should be updated in OnValidQueryPacketReceieved. (Note, bShouldAdvertise is explicitly ignored in LAN matches) ...

Default value lost when placing a struct within a user defined struct

The default value of a child struct that is added to anther struct is not retained in the parent. An example would be if the child struct contains an integer, the default value when added to another ...

When changing the variable name of Parent Blueprint, only Child Blueprint existing on the opened level becomes Dirty.

Changing the variable name of the parent Blueprint also effects the changes to the child Blueprint, but the Dirty result changes depending on whether it is placed on the level. This means that Child ...

Crash when Toggling Landscape Mode with Hidden Sub-Level containing a Landscape

A crash occurs when you have a hidden Sub-level containing a landscape and you attempt to toggle the Landscape Mode after re-opening the project. The licensee has authored their own fix for this is ...

SpeedTree static meshes corrupted converting project from 4.12 to 4.14

Speedtrees are just normal static meshes once they are in the engine, so if we are corrupting them across an engine upgrade that is really bad. ...

[CrashReport] USpeedTreeImportFactory::FactoryCreateBinary()

This is a common and longstanding SpeedTree import crash that has occurred since at least 4.14 for over 100 users. This seems to be the same issue as a previous Jira from 4.10 which was closed wit ...

Closing editor after quitting a standalone game causes a crash.

The editor will produce a crash most of the time when closing editor after quitting a standalone game. This is a regression due to it not occurring in 4.26. ...

LayeredBlendPerBone with BlendRootMotionBasedOnRootBone set incorrectly calculates root motion weightings with more than two sources

When BlendRootMotionBasedOnRootBone is true, the code in  FAnimNode_LayeredBoneBlend::Update_AnyThread that calculates the root motion weightings for the sources doesn't appear to account for the po ...

When transferring data from CPU to GPU particles using Array, if CollisionQuery is used simultaneously, the Array cannot be read correctly.

Investigate crash with replication nested ever changing attachments

There seems to be an issue with replicated attachments ending up causing cyclical setups resulting in crash on clients. It was reported for 5.2 but even after patching up code it seems to occur. ...