Once an actor channel is closed by NetCullDistance, root motion movement synchronization stops working

Networking - Jul 12, 2021

Properties that uses DOREPLIFETIME_ACTIVE_OVERRIDE (ex. RepRootMotion ) will also skip replication when an actor channel is newly opened. This means that if the variables on the server side do not c ...

Static mesh components spawned in the UCS along a spline require lighting to be rebuilt after a map reload.

Gameplay - Components - Jun 17, 2021

Seems to be somehow related to components being instanced in the Construction Script according to a spline. The transforms are slightly off by more than 1.e-2f. They are reconstructed on load with a ...

Each adding a static mesh not containing any collision data keeps increasing PhysX memory

Simulation - Physics - Apr 19, 2021

If the static mesh has UseSimpleCollisionAsComplex and does not have any SimpleCollision shapes, The physics actor will be destroyed immediately in FInitBodiesHelperBase::CreateShapesAndActors, but ...

An array of structures variable has its values reset when the structure is modified without recompiling the blueprint

Gameplay - Apr 2, 2021

An array of a structure that has been modified without the array's blueprint being complied results in the values of the array element being reset. Compiling each blueprint that has the array of str ...

Enabling Window Animations causes drop down menus to flicker and be displaced

Tools - Slate - Mar 10, 2021

I tested this with 3 Nvidia Drivers to see if I could find a driver that works properly. I tested the following Game Ready drivers Version 457.30, 461.40 and the latest, 461.72. The flicker occurred ...

SetEditorProperty does not propagate changes to loaded children blueprints

Tools - Editor - Framework - Feb 8, 2021

Changes on the Blueprint Editor are immediately propagated to the child blueprints. ...

Executing r.setres does not render correctly when Orientation of Display is Portrait on Windows PC

Rendering - RHI - Feb 5, 2021

This issue will display correctly in Portrait if you don't specify a resolution, but using r.setres will display it incorrectly. ...

Deterministic cooking issue caused by ParticleModuleTypeDataGPU

Rendering - Niagara - Jan 18, 2021

This problem is similar to the following case. [Link Removed] [Link Removed] It seems to have been fixed in 4.16, but the licensee reported it in 4.25. ...

Data validation FAILED due to IWBE_Blutility containing invalid data

Docs - Samples - Jan 11, 2021

4.26[AssetLog] D:\Binary\UE_4.26\Engine\Content\Tutorial\InWorldBlueprintEditing\TutorialAssets\IWBE_Blutility.uasset: Default__IWBE_Blutility_C is not valid. See the MapCheck log messages for detai ...

DateTime Variable in Sub Widget resets on Compile

Tools - Editor - UMG - Jan 7, 2021

When attempting to set the default value of a date time in a sub widget the changes are not kept after compiling. ...