It might not just be bosses - people in general.
I have had two bosses who when you have a conversation with them about anything personal (maybe when in the office alone on a Friday afternoon). You say something but they don’t actually respond to what you have said they just interject with a similar longer tale of their own and on then the conversation is totally focused on them. It’s like they are totally incapable of having a two way conversation- my boss atm is just awful for this and will laugh for too long at her not very funny in the first place jokes.
Is this some sort of personality disorder- seriously, like boy being able to properly interact with people?