singleton method + zsuper issue when contained in another class?

[enebo]

class Foo
  def one
    puts "Foo.one"
  end
end

class Bar
  foo = Foo.new

  def foo.one
    puts "singleton.one"
    super
  end

  foo.one
end

while examining a rails app I noticed another zsuper issue! If I remove class Bar from wrapping this we work as expected.

[enebo]

Icky. So foo.one gets current.scope from static scope which is lexical so we end up with Bar. This is surprising to realize and I half wonder what else we hit from doing this.