I found a problem, the following is my attempt to example what I came across, this problem occured because _instance is set after the constructor e.t.c. of the bean has executed.
(this code probably wont compile as i am typeing it from my head)..

@EBean(scope="singleton")
class DatabaseHelper
{
}

@EBean(scope="singleton")
class Worker1
{
  @Bean
  DatabaseHelper database;
}

@EBean(scope="singleton")
class Worker2
{
  @Bean
  DatabaseHelper database;
  @Bean
  Worker1 worker1;
}

@Bean(activity/fragment/whatever)
class someotherclass
{
  @Bean
  Worker2 worker2;
}

In this case, worker2 creates a database helper and worker1
worker1 will also create a new databasehelper..

If _instance was set in the constructor to "this", then we would only get one instance of databasehelper.

I had a go at making the changes myself, but after making the change, i couldnt compile the source through some error unleated to where i had made changes.