How to add static mesh as static mesh element (possible bug)

Hi all,

So I have installed the latest 4.13 version of UE and I seem to be unable to use custom static meshes as any element. What I mean by this is…

I am able to select the mesh in the dropdown box after a search but it does not add the file.
I am able to select the mesh in the content browser then press the little ← arrow to add that file but it still stays blank in the mesh field.
I am able to select and drag the static mesh in the content browser but the component box still stays empty.

So as an example… I drag the static mesh in like below…

But then It just goes back to empty state

The element box works fine with any default static mesh (those available in a starter project) but not any custom static mesh.

I have attempted this now with many files and still no luck.

So my process.

Make a mesh in 3ds max (single plane) > Center the pivot > center to grid > File > export selected.

Then, Right click content browser in UE4 > import file >

Then made a basic BP Class Actor.

In construction script I have this…

Update

I now know this is not a BP issue as I am having the same problem trying to add an animation sequence to a skeletal mesh in the details panel.