SmartIntroduce / Surround With: duplicate suggestions

Code:

public void f(int a, int b) {
a + b]]>
int c = a + b;
}

When expanding a custom "Surround With" template using Ctrl-Alt-J, SmartIntroduce
presents the following list of suggestions:

"Select an expression:"
a + b
a + b

"a + b" is suggested twice.