List + Struct _ Struc always at Default Values

I have started to use the List type introduced in 4.15.
I am loving it except for a couple of issues I have faced.
For my purposes I had to create an Enum and a Struct. I am using the Enum as Keys in the list and the struct as values.
When Im setting the struct default values in the list elements everything works fine, however if im exposing it to Editor the Struc values are staying on the Default, (I have compiled&Saved everything).

any ideas?