Consider the following:

class Pogo {
  String foo
}
class Test {
  void meth(Pogo pogo) {
    pogo.with {
      def f = foo
      foo = 'bar'
      foo += 'baz'
    }
  }
}

Searching for references of Pogo#foo fails to find the occurrences in the with block of Test#meth. Code hover and select also fails to refer back to the property. If @CompileStatic is added to the class or method, the operations work as expected.