One-to-one relationship with cascading deletion and softdelete creates empty records

When using softdelete behaviour with cascading deletion on a one-to-one relationship, Doctrine will create a 'child' record if it doesn't exist already, during the cascading deletion. Eg:

• Models Foo, Bar, both SoftDelete
• Foo hasOne Bar
• $myFoo->delete()

Result is:

• $myFoo->deleted_at is set correctly as expected
• New Bar record is created & saved in the process (but is not set to deleted)

Is this expected behaviour? I've attached a test case script, tested against export from SVN of Doctrine 1.2.3 that demonstrates this.