[MAJOR] Almost all hidden properties are now disallowed, they have been allowed since UEFN released until 34.30.

[Fire_Tiger369]

I have reported and shown an example to the Meshes and World Position Offset (WPO) materials that scale dynamically here: World Position Offset Having Rendering And Flickering Issues

This is due to BoundsScale and bDisallowNanite being disallowed