I tend to use WPOs in my materials for various animations to save on memory and resources however when trying to use that mesh in the BuildingProp Blueprint, WPOs don’t work on the mesh when using normally. The Mesh will render fine when put in a level but completely ignores WPOs. I tested both in game and editor and in both views its absolutely static. I can also confirm it has nothing to do with feature sets or quality switches as I have tested in all types of qualities and rendering methods so I believe its an issue with the Blueprint or the Parent itself
However there is a really bizarre workaround that also causes some downsides. You can add a secondary mesh as a child in that blueprint which for some reason works just like any other actor blueprint with WPOs however the downside is that it doesn’t generate weakspots in game under the primary, intentional mesh slot.