TMaps do not function as expected in the details panel when then TMap variable is in a blueprint component

The default element can be added multiple times and changing the value from the drop down.
 
 

Open attached project and open the only level (Blank.umap).

There are two objects in the scene, TestPointLight and BP_TestPointLight.

In the details panel, Under the testing category of each PointLight Component there are two variables one a simple TMap and a second FPerPlatformFloat which uses TMap internally. 

They will both fail to work properly when modifying them in the BP_TestPointLight but not in the TestPointLight Actor.