Drag/drop variable into a category with a CamelCase name causes a duplicate category to appear in drop down

If a category exists in a blueprint with it's name in "CamelCase" without a space, dragging a variable in the My Blueprint tab into this category causes the Category dropdown in Details tab to produce a duplicate category named "Camel Case" (with a space).

1. Open UE4 Editor (Any project)
2. Create Blueprint based on Actor (ActorBP)
3. Add two variables of any type
4. Set one variable's type to CamelCase
5. In My Blueprint tab, drag second variable onto CamelCase to apply this category to the variable
6. With the second variable selected, expand the Category dropdown in Details tab

Result:
Category dropdown now lists "CamelCase" and "Camel Case" as separate categories

Expected:
Second variable is added to the "CamelCase" category without adding a second.