"If" node in materials causing striped artefacts when passing "Material Attributes"

Download the licensee repro here - https://github.com/lobneroO/MatFuncLighting

The opening editor scene should look like this:
[Image Removed]

Open M_Base (not MF_Edit) and switch the "GetMaterialAttributes", which is attached to the if node, directly to output node:
[Image Removed]

The lighting smooths out on the texture.

Request a info about UE-127172 bug tracker

Why does the REMOVE method of map container remove elements have memory leaks?

What is the cause of the packaging error falling back to 'GameUserSettings' in ue5?

How does TextureRenderTarget2D get TArray<uint8> type data?

How do I set a material as a post-processing material?

Do I need to call Destory method to remove components from Actor when Destory method to remove Actor?

Where can I download the source address of the deployment cotum service associated with the PixelStream plugin?

What is the difference between Camera and CineCamera?

How to delete some elements correctly when deleting an array loop?

What controls of umg have mouse wheel events in UE4.27?