Using HideCategories specifier does not hide custom categories

If a Component/ variable is given a custom category in code, using the HideCategories specifer inside the UCLASS macro does not hide the category.

1. Open UE4Editor (code project)
2. Add code to project based on Actor (MyActor)
3. In the MyActor header file add the following:

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = TestHiddenCategory)
float number;

4. Inside the UCLASS macro add the following

HideCategories = (Actor, Render, TestHiddenCategory)

5. Compile
6. Make a blueprint based on MyActor (MyActorBP)
7. Add instance of MyActorBP to the level

Result:
Actor and Rendering categories are missing (hidden) but TestHiddenCategory is still visible.

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

How does TextureRenderTarget2D get TArray<uint8> type data?

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

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

UMG RichText not appear image when packaged

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

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

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

trying to launch uefn and it is crashing and saying pakchunk4522 is courrupt, anyone have the fix for this?

How to convert the datasmith scene file to BluePrint. Create animations in BluePrint.